Sable car GAZ-2752, 2217, 2310>> Diagnostics of malfunctions>> Engine and its systems

Engine and its systems

List of possible malfunctions

Diagnostics
Elimination methods
The cranked shaft is not turned by a starter
The storage battery is discharged Tension on conclusions of the storage battery at the switched-off consumers is lower than 12 V.Pri starter inclusion from under a cowl the crash can to be distributed Charge the battery; if it is not charged — replace
Decrease in capacity of the storage battery Tension on conclusions of the storage battery at the switched-off consumers above 12 In, but at inclusion of a starter falls below 6–8 V.Pri etom from under a cowl the crash can be distributed. Be convinced that in a starter there is no short circuit (see below) Charge the battery a small current (no more than 1 And); if the capacity nevertheless is insufficient — replace the battery
Oxidation of plugs and conclusions of the storage battery, leaky landing of plugs At starter inclusion tension in an onboard network falls much below, than on conclusions of the storage battery. At starter inclusion from under a cowl the crash can be distributed Press out plugs, smooth out conclusions, grease them with any plastic greasing
The thickened oil in the engine (winter) The drop of oil does not flow down with щупа Replace oil on corresponding to climatic conditions (see. Applied fuel, oil, greasings and operational liquids)
The chain of management of the traction relay of a starter is faulty: wires are damaged, oxidized or weakened tips, contacts of the switch of ignition or the relay of inclusion of a starter do not become isolated The chain of management of the traction relay of a starter is faulty: wires are damaged, oxidized or weakened tips, contacts of the switch of ignition or the relay of inclusion of a starter do not become isolated Smooth out, press out tips of wires; replace the faulty switch of ignition or its contact part, the relay of inclusion of a starter
Short circuit or break in an involving winding of the relay of a starter. Jamming of an anchor of the relay (anchor distortion, pollution of surfaces, corrosion, etc.) At a key povorachivaniye in the situation "starter" the traction relay does not work (there is no click under a cowl), but +12 In moves on operating contact of the traction relay. Remove a starter, the relay, check its work Replace the traction relay or a starter
Contacts of the traction relay or tips of wires, bad contact to "weight" are oxidized At inclusion of a starter click under a cowl is audible, but the anchor of a starter does not rotate. Check an ohmmeter resistance of a chain «the storage battery — a starter», including a "weight" wire. If chains are serviceable, remove a starter and check operation of its relay Tighten tips of wires, press out plugs. The faulty traction relay replace
Obgoraniye, pollution or strong wear of a collector of a starter Be convinced of serviceability of the traction relay. It is possible to submit a food to a starter, passing the relay. Avoid an iskreniye near the storage battery!
On the removed starter check effort of a clip of brushes to a collector, their residual height, wear of a collector
Smooth out a collector a fine-grained glass skin, wash out unleaded gasoline, provide free moving of brushes in nests. At strong wear of a collector replace a starter
Break or short circuit in an anchor winding Be convinced of serviceability of the traction relay. It is possible to submit a food to a starter, passing the relay. Avoid an iskreniye near the storage battery!
The winding of an anchor is checked after starter dismantling by an ohmmeter or visually on isolation dimness
Replace a starter
Break or short circuit in a holding winding of the relay of a starter At starter inclusion from under a cowl the crash is distributed. Tension on the storage battery and on operating contact of the traction relay within norm. The relay is checked by an ohmmeter or on excessive heating Replace the traction relay of a starter or a starter
Pro-slipping of the coupling of a free wheeling At starter inclusion the anchor rotates, but the flywheel is motionless. Previously be convinced that the traction relay is serviceable and the gear wheel of a drive enters into gearing with a flywheel wreath (on the removed starter the gear wheel is not jammed on axes, teeths of a wreath of a flywheel in a good condition) Replace the coupling («бендикс»)
The gear wheel of the coupling of a starter or teeths of a wreath of a flywheel are damaged Survey after dismantling of knots Replace a starter, a wreath of a flywheel or a flywheel
The gear wreath is turned on a flywheel Squeal, howl from a coupling case (at starter inclusion the gear wreath rotates, the flywheel is motionless; the cranked shaft can be turned by breakthroughs, with pro-slipping) To Zakernita a flywheel near a seat of a wreath or replace. New flywheel отбалансируйте
Strong noise at starter work
The starter is fixed on the engine with a distortion, weakened its fastening or the cover is broken from a drive Survey Tighten carving connections, replace the broken, worn-out details or a starter assembled
Excessive wear of plugs of bearings or necks of a shaft of an anchor Survey after starter dismantling Replace a starter
The gear wreath is turned on a flywheel At starter inclusion the gear wreath rotates, but the flywheel is motionless. Squeal is audible from a coupling case To Zakernita a flywheel near a seat of a wreath or replace. New flywheel отбалансируйте
Teeths of a gear wheel of a drive or flywheel wreath are worn-out Survey Replace a starter or a flywheel
The gear wheel does not leave gearing with a flywheel: jamming of the lever of a drive; easing or breakage of a spring of the coupling of a free wheeling or traction relay of a starter; coupling jamming on shlitsa of a shaft of an anchor or the core of the traction relay; malfunction of the switch of ignition, relay of inclusion of a starter Check of the removed starter, survey after dismantling. Operation of the switch of ignition can be checked an ohmmeter or visually Replace the traction relay of a starter or a starter assembled, the switch assembled, the relay of inclusion of a starter
The engine is not started up
In a tank there is no fuel According to the index of level and a control lamp of a reserve of fuel Fill in fuel in a tank
The storage battery is discharged Tension on conclusions of the storage battery at the switched-off consumers is lower than 12 V.Posle of several turns a starter ceases to turn a cranked shaft, thus from under a cowl the crash can be distributed Charge the battery; if it is not charged — replace
Decrease in capacity of the storage battery Tension on conclusions of the storage battery at the switched-off consumers above 12 In, but at inclusion of a starter falls to 6–8 V.Posle of several turns a starter ceases to turn a cranked shaft, thus from under a cowl the crash can be distributed. Be convinced that in a starter there is no short circuit (see above) Charge the battery a small current (no more than 1 And); if the capacity nevertheless is insufficient — replace the battery
The thickened oil in the engine (winter) Oil does not flow down on oil щупу Replace oil on corresponding to climatic conditions (see. Applied fuel, oil, greasings and operational liquids)
Damage of high-voltage devices and chains Check ignition system (see. Ignition system) Faulty coils of ignition replace. The damaged high-voltage wires replace. Under trying conditions operation (salt on roads, the frosts alternating with thaw) it is desirable to replace wires in 3–5 years
High-voltage wires are connected to ignition coils in the wrong order Survey Connect wires according to an operating procedure of cylinders (1-3-4-2)
Gaps between electrodes of candles do not correspond to norm The gap is checked round the shchupy Podgibany of a lateral electrode establish the necessary gap
Candles are faulty Candles replace obviously serviceable.
Absence of external damages and sincere between electrodes on the turned-out candle do not allow to draw a conclusion on its working capacity
Replace candles
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Gazoraspredeleniye phases are broken Check coincidence of labels on cranked and distributive shaft Establish the correct relative positioning of labels
Power supply on the control unit ignition does not arrive Check, whether arrives +12 In on contacts of 1 and 2 blocks of a plait of a control system by ignition, operation of the relay of a control system by ignition, and also — irrespective of position of the switch of ignition — on contact of the 18th block.
Check an ohmmeter contacts 2, 14, 19, 24 control units
Replace faulty relays, wires, sockets. Smooth out and press out plugs
The control unit ignition, its chains or the sensor is faulty The lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system).
Check an ohmmeter a chain of the sensor of provision of a cranked shaft, resistance of the sensor; visually check absence of mechanical damages of the sensor. Clear a sensor core of a metal dust, check a gap between it and a gear wreath of a cranked shaft (1,0–1,5 mm). The control unit for check replace obviously serviceable
Replace the faulty block, the sensor, wires
Fuel filters are littered, water in a power supply system froze, hoses are pressed, tubes of the fuel highway are deformed At a provorachivaniye of a cranked shaft a starter from an exhaust pipe does not smell as gasoline. In the poplavkovy chamber of the carburetor there is no gasoline (by pressing "gas" from a spray of the accelerating pump there is no fuel stream) In the winter put the car in warm garage, blow (the tire pump) a power supply system from the engine to a fuel tank, replace the damaged hoses and the tubes, the got littered filters
The fuel pump does not work Disconnect bringing fuel hose from the carburetor and, having clamped it a finger, pump up fuel the pump lever. The serviceable pump should develop notable pressure which should keep in a hose not less than 10 with Replace the fuel pump or its membrane
The electromagnetic valve of EPHH system is faulty or on it tension does not move at ignition inclusion (its chains, the sensor of absolute pressure are faulty the control unit ignition,) See. Carburetor. If the valve is serviceable, when giving on it +12 In from the storage battery the engine should be started up Replace the faulty valve, the control unit with ignition, provide contact in electric chains
The starting arrangement of the carburetor or its drive is faulty or is not adjusted See. Carburetor Adjust the starting arrangement, replace worn-out details
Подсос extraneous air in the inlet pipeline Examine joints, check landing of hoses, unions, an inhaling of collars. Temporarily disconnect the vacuum amplifier of brakes, having pressed the corresponding hose (the effort on a brake pedal considerably increases) Replace laying, details with the deformed flanges, the faulty vacuum amplifier
Fuel jets of the carburetor (main fuel and idling) are littered The engine is started up only after several vigorous pressing a "gas" pedal. The hot engine is started up better, than cold.
Examine, blow channels and jets
Wash out gasoline or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick). Densely wrap jets (do not damage a carving and a jet!)
Air jets are littered The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is got better, than hot. Fuel level in the poplavkovy chamber normal (for check uncover the carburetor) Wash out gasoline or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick). Densely wrap jets (do not damage a carving and a jet!)
Excessive level of fuel in the poplavkovy chamber of the carburetor The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is started up better, than hot. Remove the top cover of the carburetor, check tightness of a float, ease of its moving and lack of a zadevaniye for walls of the poplavkovy chamber. Check tightness of the needle valve: having uncovered the carburetor and having delayed a finger a float up, pump up gasoline the lever of the fuel pump. The slightest leak of gasoline from under a needle or a saddle of the valve is inadmissible Replace the needle valve, adjust fuel level in the poplavkovy chamber (see. Carburetor)
The reenriched mix because of a gasoline effluence in an engine case through the damaged diaphragm of the fuel pump Oil on щупе smells as gasoline, on single turns of the engine the lamp of a signaling device of emergency pressure of oil can light up Replace the fuel pump or its diaphragms; if in engine oil there is a lot of gasoline, and oil
The valve of a retsirkulyatsiya of the fulfilled gases jammed in open situation Try to close moving of a rod of the valve it. At average turns of the engine the rod should move (thus the valve opens at the expense of depression in a bringing hose), on single turns and at full loading — is not present.
Check operation of the thermovalve on a head of the block of cylinders: it should open at temperature over 40 °C
The faulty valve replace
In cold weather the engine is easily started up, but right there глохнет and only after several attempts of start-up starts to work steadily
The starting arrangement of the carburetor is faulty or is not adjusted See. Carburetor Adjust the starting arrangement, replace worn-out details
The engine is started up long
Gasoline from the poplavkovy chamber of the carburetor (after long parking, especially in hot weather) evaporated After fuel pumping by the lever of the fuel pump the engine is easily started up After long parking it is possible to pump up gasoline the lever of manual pumping of the fuel pump
The engine works unstably or глохнет idling
The engine is not heated-up According to the temperature index Warm up the engine to working temperature
Are littered топливопроводы, fuel filters, water got to fuel Blow channels the compressed air Clear a grid of a toplivozabornik, replace filters, at suspicion with poor quality of gasoline, especially on the eve of a winter season, use special additives to the fuel, connecting water. After their application it is recommended to wash out or replace fuel filters
Adjustment of idling of the engine is broken See. Carburetor Adjust idling (see. Carburetor)
Подсос extraneous air in the inlet pipeline Examine joints, check landing of hoses, unions, an inhaling of collars. Temporarily disconnect the vacuum amplifier of brakes, having pressed the corresponding hose (the effort on a brake pedal considerably will increase!) Replace the damaged laying, details with the deformed flanges, the faulty vacuum amplifier
Fuel jets of the carburetor (main fuel and idling) are littered The engine is started up only after several vigorous pressing a "gas" pedal. The hot engine is started up better, than cold.
Examine, blow channels and jets
Wash out gasoline or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick). Densely wrap jets (do not damage a carving and a jet!)
Insufficient level of fuel in the poplavkovy chamber of the carburetor The engine is badly started up and badly "pulls". Cottons in the carburetor are possible. At a pulling of the handle of a drive of an air zaslonka breakthroughs and failures decrease or disappear completely.
For check of level of fuel uncover the carburetor
Adjust fuel level
(see. Carburetor)
The fuel pump does not create necessary pressure in system Remove bringing fuel hose from the carburetor and, having clamped it a finger, pump up fuel the pump lever. The serviceable pump should develop notable pressure which should keep in a hose not less than 10 with Replace the fuel pump or its diaphragm
Air jets are littered The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is started up better, than hot. Fuel level in the poplavkovy chamber normal (for check raise a carburetor cover) Wash out solvent or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick). Densely wrap jets (do not damage a carving and a jet!)
Excessive level of fuel in the poplavkovy chamber of the carburetor The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is started up better, than hot. Remove the top cover of the carburetor, check tightness of a float, ease of its moving and lack of a zadevaniye for walls of the poplavkovy chamber. Check tightness of the needle valve: having uncovered the carburetor and having delayed a finger a float up, pump up gasoline the lever of the fuel pump. The slightest leak of gasoline from under a needle or a saddle of the valve is inadmissible Replace the needle valve, adjust fuel level in the poplavkovy chamber (see. Carburetor)
The reenriched mix because of a gasoline effluence in an engine case through the damaged diaphragm of the fuel pump Oil on щупе smells as gasoline, the lamp of a signaling device of emergency pressure of oil idling can light up Replace the fuel pump or its diaphragm; if in oil there is a lot of gasoline, and oil
The valve of a retsirkulyatsiya of the fulfilled gases jammed in open situation Try to close moving of a rod the valve. At average turns of the engine the rod should move (thus the valve opens at the expense of depression in a bringing hose), idling and at full loading — is not present The faulty valve replace (see. Carburetor)
The control unit ignition or its chains is faulty When giving +12 In from the accumulator on the electromagnetic valve operation of the engine is normalized Provide reliable contact in chains of management of EPHH, the faulty control unit with ignition replace. To reach to a place of repair it is possible, having submitted +12 In on the electromagnetic valve
Gaps between electrodes of candles do not correspond to norm Gap check special round the shchupy Podgibany of a lateral electrode establish the necessary gap or replace candles
Strong deposit on electrodes of spark plugs; hit of particles of a deposit in a gap between electrodes Survey Clear candles the compressed air or mechanically (do not damage an insulator!), be convinced of their working capacity (absence of external damages and sincere between electrodes on the turned-out candle do not allow to draw a conclusion on its working capacity). Reveal and eliminate the reason of the raised nagaroobrazovaniye in the combustion chamber, if necessary replace candles
Spark plugs are faulty: leakage of a current on cracks in an insulator or on a deposit on a thermal cone, bad contact in assembly of the central electrode Candles replace obviously serviceable or check at the special stand. Absence of external damages and sincere between electrodes on the turned-out candle do not allow to draw a conclusion on its working capacity Replace faulty candles
Damage of high-voltage devices and chains Check ignition system (see. Ignition system) Faulty coils of the ignition, the damaged high-voltage wires replace. Under trying conditions operation (salt on roads, the frosts alternating with thaw) it is desirable to replace wires in 3–5 years
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Sensors of a control system of the engine, the control unit ignition or their chains are faulty At malfunction of electronic components and electric chains the lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system).
Check an ohmmeter a chain of the sensor of synchronization, resistance of the sensor (850–900 Ohm); visually — absence of mechanical damages of the sensor. Clear of a metal dust a sensor core, check a gap between it and a gear wreath of a cranked shaft (1,0–1,5 mm)
Replace faulty the block, sensors, wires
Gazoraspredeleniye phases are broken Check coincidence of labels on cranked, intermediate and camshafts Establish the correct relative positioning of shaft (on labels)
Hydropushers are faulty Knocks in a head of the block of cylinders from a variable depending on turns of the engine by frequency. After removal check serviceability of hydropushers in an oil bath Replace faulty hydropushers
Wear of cams of camshafts Survey after partial dismantling of the engine Replace camshafts
Low compression in cylinders (less than 10 kgfs/cm2): wear or damage of valves, saddles, wear, zaleganiye or breakage of piston rings Warm up the engine to working temperature and turn out candles. Press a "gas" pedal against the stop and, inserting into candle openings компрессометр, turn a cranked shaft a starter (work together). Thus it is necessary to disconnect a control system of the engine (having taken out the corresponding safety lock or having disconnected wires from the general relay of a food of a control system). Repeat measurements, the gulf in cylinders through candle openings of 10-15 cm3 of engine oil. In those cylinders where the compression increased more, than on 2 kgfs/cm2, possibly, are strongly worn-out, broken or rings "lay down". If the compression remained lower than 10 kgfs/cm2, wear or damage of valves or their saddles is possible Replace rings, pistons.
Repair cylinders.
Grind in valves to saddles, if necessary replace valves, them directing plugs, профрезеруйте saddles
Low turns of idling
Adjustment of idling of the engine is broken See. Carburetor Adjust idling
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
The engine is not heated-up According to the temperature index Warm up the engine to working temperature
High turns of idling
Adjustment of idling of the engine is broken See. Carburetor Adjust idling
Long driving at high turns of the engine Through 30–40 from work idling turns decrease to norm Is not malfunction
Malfunction of a drive of management of butterfly valves Check a course of a pedal of "gas", a gap in a drive (a free wheeling of a pedal), be convinced of absence of jamming of details Faulty details replace, a cable grease with engine oil
The starting arrangement of the carburetor or its drive is faulty or is not adjusted See. Carburetor Adjust the starting arrangement, replace faulty details
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
One or several sensors of system of ignition or their chain are faulty The lamp of signaling device С3 burns. It is possible to determine malfunction by codes of diagnostics (see. Ignition system). Check sensors and their chains an autotester (see the same section) Restore contact in electric chains, replace faulty sensors
Excessive level of fuel in the poplavkovy chamber of the carburetor The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is started up better, than hot. Remove the top cover of the carburetor, check tightness of a float, ease of its moving and lack of a zadevaniye for walls of the poplavkovy chamber. Check tightness of the needle valve: having uncovered the carburetor and having delayed a finger a float up, pump up gasoline the lever of the fuel pump. The slightest leak of gasoline from under a needle or a saddle of the valve is inadmissible Replace not tight needle valve, adjust fuel level in the poplavkovy chamber
The air jet of idling is littered Survey Wash out gasoline or acetone and blow a jet. At strong pollution clear it a scaffold or a needle from a soft tree (toothpick). Wash out system of ventilation of a case
The reenriched mix because of a gasoline effluence in an engine case through the damaged diaphragms of the fuel pump Oil on щупе smells as gasoline, the lamp of a signaling device of emergency pressure of oil idling can light up Replace the fuel pump or its diaphragm; if in oil there is a lot of gasoline, and oil
The butterfly valve of the second chamber of the carburetor is not completely closed On a gleam the crack between a butterfly valve and walls of the mixing chamber is visible The persistent screw of a zaslonka achieve its complete closing. Thus the zaslonka should open easily, without jamming. Upon termination of adjustment of a head of screws fill in with nitropaint
Hit of extraneous subjects under a butterfly valve Survey Remove an extraneous subject, check zaslonka work
In cold weather the engine глохнет soon after a start of motion, but after short parking is started up again
In a diffuzor of the carburetor the ice stopper (the hose of supply of warmed-up air is not connected to a branch pipe on a final collector) was formed Survey Fix a collar a hose on a branch pipe of a fence of warmed-up air
In hot weather the engine stops spontaneously and started up hardly
Steam stopper in a power supply system Fuel does not arrive to the carburetor. Cool the fuel pump Eliminate excesses of hoses, replace the deformed tubes fuel plum in a tank. Replace the fuel pump
The engine does not develop full capacity and does not possess sufficient acceleration performance. Breakthroughs and "failures" at car movement
The engine is not heated-up According to the temperature index Warm up the engine to working temperature
In a tank there is not enough fuel According to the index of level of fuel According to the index of level of fuel
The fuel pump does not create necessary pressure in system Remove bringing fuel hose from the carburetor and, having clamped it a finger, pump up fuel the pump lever. The serviceable pump should develop notable pressure which should keep in a hose not less than 10 with Replace the fuel pump or its diaphragm
Bad contact in a control unit chain ignition It is checked by an ohmmeter at the disconnected chains or the voltmeter energized Smooth out contacts, press out plugs, replace faulty relays, wires
Are littered топливопроводы, fuel filters, are pressed hoses, tubes are deformed, water got to fuel Survey Clear a petrolreceiver grid, replace filters, tubes, eliminate excesses of hoses. In the winter put the car in warm garage, blow (the tire pump) a power supply system from the engine to a fuel tank. At suspicion on poor quality of gasoline, especially on the eve of a winter season, use special additives to the fuel, connecting water. After their application it is recommended to wash out to (replace) fuel filters
Insufficient level of fuel in the poplavkovy chamber of the carburetor At a pulling of the handle of a drive of an air zaslonka breakthroughs and "failures" decrease or disappear.
For check of level of fuel uncover the carburetor
Adjust fuel level
(see. Carburetor)
Jets and carburetor channels are littered.
Jets are leaky wrapped
Examine, blow channels and jets Wash out solvent or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick). Densely wrap jets (do not damage a carving and a jet!)
The accelerating pump is faulty, its spray is littered or deformed Check pump giving, the stream direction, lack of a podtekaniye of gasoline from under a diaphragm. Be convinced of free moving of the lever of the accelerating pump Replace faulty details, tighten carving connections, blow channels
Подсос extraneous air in the inlet pipeline Examine joints, check landing of hoses, unions, an inhaling of collars. For short time disconnect the vacuum amplifier of a brake, having pressed the corresponding hose (it is careful: the effort to brake pedals considerably will increase) Replace laying, details with the deformed flanges, the faulty vacuum amplifier
Excessive level of fuel in the poplavkovy chamber of the carburetor The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is got better, than hot. Remove the top cover of the carburetor, check tightness of a float, ease of its moving and lack of a zadevaniye for walls of the poplavkovy chamber. Check tightness of the needle valve: having uncovered the carburetor and having delayed a finger a float up, pump up gasoline the lever of the fuel pump. The slightest leak of gasoline from under a needle or a saddle of the valve is inadmissible Replace the needle valve, adjust fuel level in the poplavkovy chamber
The reenriched mix because of a gasoline effluence in an engine case through the damaged diaphragm of the fuel pump Oil on щупе smells as gasoline, the lamp of a signaling device of emergency pressure of oil on idling turns, idling unstable can light up Replace the fuel pump or its diaphragm; if in oil there is a lot of gasoline, and oil
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Gaps between electrodes of candles do not correspond to norm Gap check round the shchupy Podgibany of a lateral electrode establish the necessary gaps or replace candles
Strong deposit on electrodes of candles; hit of particles of a deposit in a gap between electrodes Survey Clear candles mechanically (do not damage an insulator!). Reveal and eliminate the reason of the raised nagaroobrazovaniye in combustion chambers, if necessary replace candles
Candles are faulty; leakage of a current on cracks in an insulator or on a deposit on a thermal cone Candles replace obviously serviceable. Absence of external damages and sincere between electrodes on the turned-out candle do not allow to draw a conclusion on its working capacity Replace faulty candles
Breakdown of isolation of high-voltage chains It is checked by an ohmmeter and visually (black cracks, an isolation oplavleniye). For check of high-voltage wires replace them obviously serviceable Replace faulty coils or high-voltage wires
The sensor of synchronization or its chain is faulty The lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system).
Check an ohmmeter a chain of provision of a cranked shaft, resistance of the sensor (850–900 Ohm); visually — absence of mechanical damages of the sensor. Clear of a metal dust a sensor core, check a gap between it and a gear wreath of a cranked shaft (1,0–1,5 mm)
Restore contact in electric chains, replace the faulty sensor
Some sensors of a control system of ignition or their chains (except the synchronization sensor — see above) failed at the same time The lamp of a signaling device of SZ burns. It is possible to determine malfunction by codes of diagnostics (see. Ignition system).
Check sensors and their chains an autotester
Restore contact in electric chains, replace faulty sensors
The control unit ignition or its chains is faulty As a rule, the lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system). For check of the block replace it obviously serviceable Replace the faulty block, restore contact in electric chains
Incomplete opening of butterfly valves Is defined visually on the idle engine Adjust a drive of butterfly valves
Gazoraspredeleniye phases are broken Check coincidence of labels on cranked and camshafts Establish the correct relative positioning of shaft (on labels)
Low compression in cylinders (less than 10 kgfs/cm2): wear or damage of valves, their saddles, wear, "zaleganiye" or breakage of piston rings Warm up the engine to working temperature and turn out candles. Press against the stop a pedal of "gas" and, inserting into candle openings компрессометр, turn a cranked shaft a starter (work together). Thus it is necessary to disconnect a control system of the engine (having taken out the corresponding safety lock or having disconnected wires from the general relay of a food of a control system or the sensor). Repeat measurements, the gulf in cylinders through candle openings of 10-15 cm3 of engine oil. In those cylinders where the compression increased more than on 2 kgfs/cm2, possibly, are strongly worn-out, broken or rings lay down. If the compression remained lower than 10 kgfs/cm2, wear or damage of valves or their saddles are possible Replace rings, pistons. Repair cylinders. Grind in valves to saddles, if necessary replace valves, them directing plugs, pierce saddles
Gaps in a drive of valves are broken Knocks under a cover of a head of the block.
The removed hydropushers check in an oil bath
Faulty hydropushers replace
Strong wear of cams of a camshaft (shaft) Survey and measurement after partial dismantling of the engine Replace a worn-out camshaft (shaft)
Deposit or breakage of klapanny springs Survey, measurement of length of springs in a free condition and under loading (after partial dismantling of the engine) Replace settled or broken springs
Cottons in the inlet pipeline
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Adjust a corner of an advancing of ignition
Gazoraspredeleniye phases are broken Check coincidence of labels on cranked and camshafts Establish the correct relative positioning of shaft (on labels)
"Shots" in the exhaust silencer
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Gazoraspredeleniye phases are broken Check coincidence of labels on cranked and camshafts Establish the correct relative positioning of shaft (on labels)
Breakdown of isolation of high-voltage chains It is checked by an ohmmeter and visually (black cracks, an isolation oplavleniye). High-voltage wires for check replace obviously serviceable Replace faulty coils, high-voltage wires, their tips
Cottons in the inlet pipeline after operation of the engine on moshchnostny modes
Candles with inappropriate kalilny number are used
Establish the candles recommended by manufacturer
The increased fuel consumption
Power supply system leakage Gasoline smell, smudges Tighten collars on hoses, carving connections. Check landing of unions; when weakening landing replace the corresponding knots
Gasoline effluence in an engine case through the damaged diaphragm of the fuel pump Oil on щупе smells as gasoline, the lamp of a signaling device of emergency pressure of oil on single turns of the engine can light up Replace the fuel pump or its diaphragms; if in oil there is a lot of gasoline, and oil
The increased resistance to car movement Выбег the heated-up not loaded car (after run not less than 20 km) since speed of 50 km/h to a full stop should be not less than 400 m Check and adjust pressure in tires, corners of installation of forward wheels, work of brake system
The starting arrangement of the carburetor or its drive is faulty or is not adjusted See. Carburetor Adjust the starting arrangement, replace worn-out details
The increased resistance of an inlet path or final system Check an element of the air filter, an inlet path (lack of extraneous subjects, leaves, etc.), release system Clear an inlet path. Replace the polluted element of the air filter, the deformed or littered elements of system of release
Excessive level of fuel in the poplavkovy chamber of the carburetor The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is got better, than hot. Remove the top cover of the carburetor, check tightness of a float, ease of its moving and lack of a zadevaniye for walls of the poplavkovy chamber. Check tightness of the needle valve: having uncovered the carburetor and having delayed a finger a float up, pump up gasoline the lever of the fuel pump. The slightest leakage of gasoline from under a needle or a saddle of the valve is inadmissible Replace the needle valve, adjust fuel level in the poplavkovy chamber
Air jets are littered.
The valve of the accelerating pump is not tight
The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is started up better, than hot. Fuel level in the poplavkovy chamber normal (for check uncover the carburetor) Wash out gasoline or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick). Densely wrap jets (do not damage a carving and a jet)
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Candles are damaged: leakage of a current on cracks in an insulator or on a deposit on a thermal cone, bad contact in assembly of the central electrode Replace candles obviously serviceable. Absence of external damages and sincere between electrodes on the turned-out candle do not allow to draw a conclusion on its working capacity Replace faulty candles
Idling adjustment is broken See. Carburetor Adjust idling
The butterfly valve of one of carburetor chambers is not completely closed On a gleam the crack between a butterfly valve and walls of the mixing chamber is visible The persistent screw of a zaslonka achieve its complete closing. Thus the zaslonka should open easily, without jamming. Upon termination of adjustment of a head of screws fill in with paint
To Zaslonki of the carburetor are established on axes with a distortion and are not closed at any position of persistent screws Survey Address on HUNDRED or replace the carburetor
Hit of extraneous subjects under a butterfly valve Survey Remove an extraneous subject, check zaslonka work
One or several sensors of system of ignition or their chain are faulty The lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system).
Check sensors and their chains an autotester
Restore contact in electric chains, replace faulty sensors
The control unit ignition or its chains is faulty As a rule, the lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system). For check of the block replace it obviously serviceable Replace the faulty block, restore contact in electric chains
Low compression in cylinders (less than 10 kgfs/cm2): wear or damage of valves, saddles, wear, "zaleganiye" or breakage of piston rings Warm up the engine to working temperature and turn out candles. Press against the stop a pedal of "gas" and, inserting into candle openings компрессометр, turn a cranked shaft a starter (work together). Thus it is necessary to disconnect a control system of the engine or to disconnect the sensor.
Repeat measurements, the gulf in cylinders through candle openings on 10–15 cm3 of engine oil. In those cylinders where the compression increased more, than on 2 kgfs/cm2, are probably strongly worn-out, broken or rings "lay down". If the compression remained lower than 10 kgfs/cm2, wear or damage of valves or their saddles is possible
Replace rings, pistons. Repair cylinders. Grind in valves to saddles, if necessary replace valves, them directing plugs, repair saddles
Raised consumption of oil (more than 1 l on 1000 km of run)
Oil leak through laying and cuffs: wear of condensing edges, hardening of laying, a buckling of privalochny surfaces Wash up the engine, then after short run define places of possible leak Tighten screws of fastening of the pallet of a case, a cover of a head of the block of cylinders, the fuel pump; replace worn-out cuffs
Oil leak through laying and epiploons: the system of ventilation of a case is littered Survey Clean ventilation system
Wear, loss of elasticity of maslootrazhatelny caps of valves.
Wear of cores of the valves, directing plugs
Gray smoke from an exhaust pipe, survey after engine dismantling Replace worn-out details
Wear, breakage or zakoksovyvaniye (mobility loss) piston rings, wear of sleeves of cylinders Gray smoke from an exhaust pipe, survey after engine dismantling Replace rings, clear flutes in pistons, replace worn-out pistons
Insufficient pressure of oil
There is not enough oil in the engine According to the index of level of oil Add oil
Application of oil of inappropriate viscosity
Replace oil
Contamination of a grid of a maslopriyemnik Survey Clear a grid
Distortion, contamination of the reduktsionny valve or weakening of its spring Survey Clear the valve. Replace the faulty valve and/or a spring
Wear of gear wheels of the oil pump Survey, gap measurement shchupy Replace the oil pump
Excessive gap between loose leaves and necks of a cranked shaft Is defined by a measurement of details after engine dismantling Replace worn-out loose leaves. If necessary replace or repair a cranked shaft
Razzhizheniye of oil because of gasoline course in an engine case through the damaged diaphragm of the fuel pump Oil on щупе smells as gasoline, the lamp of insufficient pressure of oil on single turns of the engine can light up Replace the fuel pump or its diaphragm; if in oil there is a lot of gasoline, and oil
The sensor of emergency pressure of oil or its index is faulty Check by means of a manometer and an ohmmeter (see. Check of control devices and sensors) Replace the faulty sensor or the index
The engine overheats (an arrow of the index of temperature of cooling liquid is in a red zone)
The sensor or the temperature index is faulty Check the index and the sensor an autotester (see. Control devices) The faulty sensor, the index — replace
The thermostat is faulty See. Thermostat check on the car and Removal and thermostat check Replace the faulty thermostat
Weak tension of a belt of a drive of the pump of cooling liquid Survey Tighten a belt, if necessary replace
The pump of cooling liquid is faulty The pump pulley at the removed belt of a drive should be turned easily by hand and not have люфта Replace the pump
There is not enough liquid in cooling system Level of liquid is lower than a label on a broad tank Eliminate leaks. Add cooling liquid
Steam jams in cooling system Strong increase of level of cooling liquid in process of engine warming up Remove a parootvodyashchy hose of a broad tank from a cover of the thermostat and let the air out
Scum in cooling system
Wash out system of cooling by means for scum removal, do not use hard water in cooling system. The concentrated antifreeze plant only with the distilled water
Radiator cells are polluted Survey Wash out a radiator a water stream under pressure
The system electrofan охлаждения* does not turn on Close on "weight" contact of a thermoswitch of a radiator. If the fan earned, the thermoswitch if is not present is faulty — electric chains, the relay or the fan electric motor are faulty.
Check, whether moves +12 In on operating and power contacts of the relay of the electrofan. If yes, that relays or the fan electric motor, differently — a relay power-supply circuit (it is checked by an ohmmeter), a safety lock on 30 And in a motor compartment are faulty
Restore contact in electric chains. Faulty a thermoswitch, the relay, the electric motor replace. Eliminate the reason of a peregoraniye of a safety lock, replace a safety lock
The low octane number of gasoline is inadmissible Operation of the engine is accompanied by distinct detonation knocks Fill the car with the fuel recommended by manufacturer
It is a lot of deposit in the combustion chamber, on the bottoms of pistons, plates of valves Survey after removal of a head of the block of cylinders Eliminate the nagaroobrazovaniye reason.

Apply oils of the recommended viscosity and quality, clear details
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Constantly the system electrofan охлаждения* (even works at the cold engine)
Contacts of a thermoswitch of the fan or its wire are not disconnected will close on "weight" If at a wire detachment from a thermoswitch the fan ceases to work, the switch if for this purpose it is necessary to disconnect the same wire from the relay is faulty – a wire will close on "weight" Replace a thermoswitch, eliminate short circuit
Contacts of the relay of turning on of the electrofan are not disconnected Check by a tester Replace the relay
The engine long gets warm to working temperature
The thermostat is faulty See. Thermostat check on the car and Removal and thermostat check Replace the faulty thermostat
Low air temperature (the minus of 15 °C is lower)
Warm the engine: establish a cowl thermonoise isolation, guards before a radiator (do not block all area of a radiator in a zone of a krylchatka of the fan!)
Falling of level of cooling liquid in a broad tank
Damage of a radiator, hoses, weakening of their fastening on branch pipes. Podtekaniye of liquid from the heater crane Survey.
Tightness of a radiator (the engine and a heater) is checked in a bath with hot water the compressed air under the pressure of 1 kgf/cm2
Replace the damaged details. Tighten collars on hoses
Leakage of liquid through an epiploon of the pump of cooling liquid Survey Replace the pump
Steam jams in cooling system Sharp falling of level of the cooling liquid, being accompanied an exit of vials in a broad tank Eliminate the overheat reasons
Laying of a head of the block of cylinders is damaged. Damage of the block or head of the block of cylinders At oil replacement from a case the emulsion with a whitish shade pours out.
Emergence of a plentiful white smoke from the exhaust silencer and oil spots on a liquid surface (in a broad tank) is possible. Begin to flow cooling liquid on an external surface of the engine
Replace faulty details
Detonation (the metal knocks of a high-pitch tone arising, as a rule, at operation of the engine under loading, especially on low turns — dispersal «внатяг», etc. — and loadings disappearing at decrease)
The low octane number of gasoline is inadmissible
Fill the car with the fuel recommended by manufacturer
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Engine overheat According to the temperature index Eliminate the overheat reason
It is a lot of deposit in the combustion chamber, on the bottoms of pistons, plates of valves Survey after removal of a head of the block of cylinders Eliminate the nagaroobrazovaniye reason.
Apply oils of the recommended viscosity and quality
Candles with inappropriate kalilny number are used
Establish the candles recommended by manufacturer
Extraneous noise and knocks in the engine (except a detonation, see above)
The valve hydropusher knocks Chirring knock in a zone of a head of the block of cylinders. Often at warming up knock decreases or completely disappears (is admissible on the serviceable engine, especially after long parking). Survey after partial dismantling of the engine Replace a faulty hydropusher.
It is desirable to examine the corresponding valve.
Breakage or wear of a gidronatyazhitel of a chain Uniform noise in a forward part of the engine. It amplifies at average turns and variable loadings (it is well audible at decrease in turns of the engine with 2000–2500 to 1000–1500 mines-1) Replace a faulty gidronatyazhitel and/or a boot
The valve spring is broken Spasmodic weak postukivaniye in a zone of a head of the block of cylinders. Survey after partial dismantling of the engine Replace a spring
The gap between a core of the valve and the directing plug is increased Knock of average force and height in a zone of a head of the block of cylinders.
Measure details
Replace the valve, the plug
Camshaft cams, pushers are strongly worn-out Knock same, as at the increased gaps in the valve the mechanism (see above).
Survey after partial dismantling of the engine
Replace faulty details
Knock of cranked and distributive shaft, shatunny bearings, pistons, piston fingers, strong люфт or jamming of bearings of the pump of cooling liquid Check on HUNDRED Repair of details on HUNDRED or replacement of knots and details
Strong vibration of the engine
Unevenness of a compression on cylinders more than 2 kgf/cm2, wear or damage of valves, saddles, wear, "zaleganiye" or breakage of piston rings Warm up the engine to working temperature and turn out candles. Press against the stop a pedal of "gas" and, inserting into candle openings компрессометр, turn a cranked shaft a starter (work together). Thus it is necessary to disconnect system of ignition of the engine (or having disconnected the synchronization sensor). Repeat measurements, the gulf in cylinders through candle openings of 10-15 cm3 of engine oil.
In those cylinders where the compression increased more, than on 2 kgfs/cm2, possibly, are strongly worn-out, broken or rings "lay down". If the compression remained lower than 10 kgfs/cm2, wear or damage of valves or their saddles is possible
Replace rings, pistons. Repair cylinders. Grind in valves to saddles, if necessary replace valves, them directing plugs, repair saddles
Lost elasticity or pillows of support of the power unit collapsed Survey Replace pillows of support
The raised content of harmful substances in the fulfilled gases
Excessive level of fuel in the poplavkovy chamber of the carburetor The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is got better, than hot. Remove the top cover of the carburetor, check tightness of a float, ease of its moving and lack of a zadevaniye for walls of the poplavkovy chamber.
Check tightness of the needle valve: having uncovered the carburetor and having delayed a finger a float up, pump up gasoline the lever of the fuel pump. The slightest leak of gasoline from under a needle or a saddle of the valve is inadmissible
Replace not tight needle valve, adjust fuel level in the poplavkovy chamber
The reenriched mix because of a gasoline effluence in an engine case through the damaged diaphragm of the fuel pump Oil on щупе smells as gasoline, fire of a lamp of a signaling device of emergency pressure of oil idling the engine is possible Replace the fuel pump or its diaphragm; if in oil there is a lot of gasoline, and oil
The starting arrangement or its drive is faulty or is not adjusted See. Carburetor Adjust the starting arrangement, replace worn-out details
The increased resistance to an air stream in an inlet path Check an element of the air filter, an inlet path (lack of extraneous subjects, leaves, etc.) Clear the inlet path, the polluted element of the air filter replace
Adjustment of idling of the engine is broken See. Carburetor Adjust idling
Air jets are littered. The valve of the accelerating pump is not tight The strong smell of the gasoline proceeds from an exhaust pipe, the cold engine is started up better, than hot.
Fuel level in the poplavkovy chamber normal (for check uncover the carburetor)
Wash out gasoline or acetone and blow jets, at strong pollution clean them a scaffold or a needle from a soft tree (toothpick).
Densely wrap jets (do not damage a carving and a jet!)
Discrepancy of the moment of an iskroobrazovaniye to the optimum See. Ignition system Check ignition system (see. Ignition system)
Damage of high-voltage devices and chains Check ignition system (see. Ignition system) Replace faulty coils/coils of ignition. The damaged high-voltage wires replace. Under trying conditions operation (salt on roads, the frosts alternating with thaw) it is desirable to replace wires of times in 3–5 years.
Spark plugs are faulty: leakage of a current on cracks in an insulator or on a deposit on a thermal cone, bad contact in connection of the central electrode Candles replace obviously serviceable. Absence of external damages and sincere between electrodes on the turned-out candle do not allow to draw a conclusion on its working capacity Replace faulty candles
One or several sensors of system of ignition of the engine or their chain are faulty As a rule, the lamp of signaling device С3 burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system).
Check sensors and their chains an autostarter
Restore contact in electric chains, replace faulty sensors
The control unit the engine or its chains is faulty The lamp of a signaling device of SZ burns. It is possible to determine by codes of diagnostics precisely malfunction (see. Ignition system). For check of the block replace it obviously serviceable Replace the faulty block, restore contact in electric chains
The lamp of a signaling device of SZ burns at operation of the engine
The control unit the engine, its chains, sensors is faulty. Malfunction can be temporary — then the lamp of a signaling device of SZ can go out itself, without any intervention See. Ignition system, an electric circuit in Appendices, the previous sections «Diagnostics of malfunctions» At failure of the majority of sensors (except the synchronization sensor) it is possible to reach to a repair place under the own steam
Replace faulty the block, sensors, wires