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2.2.28. Diagnostics of malfunctions of the engine

Symptom Possible reason
The engine is not turned in start attempt Battery plugs are oxidized, or fastening of tips of wires on them weakened (see the Head Routine maintenance of the car).
The battery is discharged or faulty (see the Head Routine maintenance of the car).
Automatic transmission is not qualitatively entered into situation "P" (see the Head the Automatic Transmission (AT)) or - on models with the coupling sensor switch - coupling is squeezed not up to the end out (see the Head Stsepleniye).
The electrical wiring of a chain of system of start is torn off or is otherwise damaged, or fastening of plugs of contact connections weakened (see Chapters System of ignition and System of onboard electric equipment).
Teeth of a driving gear wheel of a starter are jammed in a gear wreath of a flywheel (see the Head Sistem of ignition).
The traction relay of a starter is faulty (see the Head Sistem of ignition).
The starter electric motor is faulty (see the Head Sistem of ignition).
The ignition switch is faulty (see the Head Sistem of onboard electric equipment).
Teeth of a driving gear wheel of a starter or wreath of a flywheel are broken off or worn-out (see Chapters the Engine and Control systems of the engine and decrease in toxicity of the fulfilled gases).
Internal damage of the engine takes place (see the Part of the Procedure of capital repairs of components of the engine).
The engine is turned, but not started The fuel tank is empty.
The battery is discharged (the engine is turned too slowly) (see the Head Sistem of ignition).
Battery plugs are oxidized, or fastening of tips of wires on them weakened (see the Head Routine maintenance of the car).
Leak of fuel through an injector(s) takes place, the fuel pump or the regulator of pressure, etc. is faulty (see the Head the Power supply system).
Fuel does not reach system of the injection/carburettor (see the Head the Power supply system).
Components of system of ignition are humidified or damaged (see the Head Sistem of ignition).
The fuel injector is jammed in open situation (see the Head the Power supply system).
Spark plugs are worn-out or damaged, or installation of interelectrode gaps is broken (see the Head Routine maintenance of the car).
The electrical wiring of a chain of system of start is torn off or is otherwise damaged, or fastening of plugs of contact connections weakened (see the Head Sistem of ignition).
Bolts of fastening of the distributor weakened that led to failure of installation of a corner of an advancing of ignition (see Chapters Routine maintenance of the car and System of ignition).
The ignition coil electrical wiring is torn off or is otherwise damaged, or fastening of plugs of contact connections weakened (see Chapters System of ignition).
The ignition coil is faulty (see the Head Sistem of ignition).
Start of the cold engine is complicated The battery is discharged (see the Head Routine maintenance of the car).
Functioning of a power supply system is broken (see the Head the Power supply system).
Leak through an injector(s) takes place, or functioning of automatic equipment of start is broken (see the Head the Power supply system).
On the runner of the distributor of ignition coal paths were formed (see the Head Sistem of ignition).
Start of the hot engine is complicated The filtering air cleaner element is polluted, or its passability is otherwise broken (see the Head Routine maintenance of the car).
Fuel does not reach system of the injection/carburettor (see the Head the Power supply system).
Battery plugs are oxidized - special attention should be paid to a condition of the plug of grounding (negative) (see the Head Routine maintenance of the car).
Input of a starter in gearing is complicated, or is followed by extraneous noises Teeth of a driving gear wheel of a starter or wreath of a flywheel are broken off or worn-out (see the Head Sistem of ignition).
Bolts of fastening of a starter weakened or dropped out (see the Head Sistem of ignition).
The engine is started, but at once becomes deaf Fastening of plugs of contact connections on the distributor, the coil of ignition or the generator weakened (see the Head Sistem of ignition).
Serviceability of supply of fuel in system injectors the injection/carburettor is broken (see Chapters Cars of the BMW 5-brand of a series and the Power supply system).
Sensors of speed of system of injection of fuel are faulty (see the Head Sistem of ignition).
Relays of an electric chain of system of injection are faulty (see the Head Sistem of ignition).
Under the engine during the parking of the car oil smudges are formed Leaks through laying and/or a drain stopper of the pallet of a case take place (see the Head Dvigatel).
Leak via the oil pressure sensor takes place (see the Head Dvigatel).
Leaks through laying of a cover of a head of cylinders take place (see the Head Dvigatel).
Leaks through epiploons of shaft of the engine take place (see the Head Dvigatel).
Stability of turns of idling is broken Depression losses take place (see the Head the Power supply system).
The filtering air cleaner element is blocked (see the Head Routine maintenance of the car).
The fuel pump does not provide giving of due amount of fuel in system the injection/carburettor (see the Head the Power supply system).
Tightness of laying of a head of cylinders is broken (see the Head Dvigatel).
The gas-distributing belt / chain or its gear wheels/asterisks is worn-out (see the Head Dvigatel).
Working ledges of cams of the camshaft are worn-out (see the Head Dvigatel).
The coal adsorber is faulty (if that is provided) (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Admissions of ignition at single turns of the engine take place Spark plugs are worn-out or damaged, or installation of interelectrode gaps is broken (see the Head Routine maintenance of the car).
VV of a wire of spark plugs are faulty (see the Head Routine maintenance of the car).
Depression losses take place (see the Head Routine maintenance of the car).
Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition).
Fell, or compression pressure is distributed between cylinders unevenly (see the Head Dvigatel).
The coal adsorber is faulty (if that is provided) (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Admissions of ignition take place at the movement on transfer Passability of the fuel filter is broken, or the power supply system is polluted (see the Head Routine maintenance of the car).
Injectors do not provide adequate injection of fuel, or passability of fuel jets of the carburetor is partially broken (see the Head the Power supply system).
Spark plugs are worn-out or damaged, or installation of interelectrode gaps - petrol models is broken (see the Head Routine maintenance of the car).
Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition).
The distributor cover is burst, wire VV were disconnected, or other components of the distributor are damaged (see the Head Routine maintenance of the car).
VV of a wire of spark plugs are faulty (see the Head Routine maintenance of the car).
Components of systems of decrease in toxicity of the fulfilled gases are faulty (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Fell, or compression pressure is distributed between cylinders unevenly (see the Head Dvigatel).
Functioning of system of ignition is broken (see the Head Sistem of ignition).
Losses of depression in system of injection, on the inlet pipeline or through connecting hoses take place (see the Head the Power supply system).
Admissions of ignition happen during acceleration of the engine Spark plugs are faulty (see the Head Routine maintenance of the car).
Functioning of system of the injection/carburettor is broken (cm the Head the Power supply system).
The fuel filter is blocked (see Chapters Cars of the BMW 5-brand of a series and the Power supply system).
Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition).
Leak of air via the inlet pipeline takes place (see the Head the Power supply system).
Engine turns spontaneously raise at not movably withheld accelerator pedal Leak of the soaked-up air take place (see the Head the Power supply system).
The fuel pump is faulty (see the Head the Power supply system).
Fastening of terminal connections of a plait of an electrical wiring of an injector of fuel weakened (see Chapters the Power supply system and Control systems of the engine and decrease in toxicity of the fulfilled gases).
The electronic control unit (ECU) is faulty (see the Head Sistem of ignition).
The power developed by the engine fell Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition).
The distributor shaft side play is excessive (see the Head Sistem of ignition).
The runner or cover of the distributor, or wire VV are worn-out (see Chapters Cars of the BMW 5-brand of a series and System of ignition).
Spark plugs are faulty, or adjustment of an interelectrode gap is broken (see the Head Routine maintenance of the car).
Functioning of system of the injection/carburettor is broken (see the Head the Power supply system).
The ignition coil is faulty (see the Head Sistem of ignition).
Brakes are taken (see the Head Routine maintenance of the car).
Level of liquid of automatic transmission fell (see the Head Routine maintenance of the car).
Coupling revolves (see the Head Stsepleniye).
The fuel filter is blocked and/or the power supply system is polluted (see the Head Routine maintenance of the car).
Functioning of systems of decrease in toxicity of the fulfilled gases is broken (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Fell or compression pressure is distributed between cylinders unevenly (see the Head Dvigatel).
The engine spontaneously becomes deaf Installation of turns of idling is broken (see the Head Routine maintenance of the car).
Passability of the fuel filter is broken, or moisture or other pollution got to a power supply system (see the Head Routine maintenance of the car).
Distributor components are humidified or damaged (see the Head Sistem of ignition).
Components of systems of decrease in toxicity of the fulfilled gases are faulty (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Spark plugs are faulty, or adjustment of an interelectrode gap is broken (see the Head Routine maintenance of the car).
VV of a wire of spark plugs are faulty (see the Head Routine maintenance of the car).
Losses of depression in system of injection, on the inlet pipeline or through connecting hoses - petrol models take place (see the Head the Power supply system).
There are "shots" in system of production of the fulfilled gases Functioning of systems of decrease in toxicity of the fulfilled gases is broken (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition).
The secondary contour of system of ignition is faulty (defects of insulators of candles, VV of wires, covers and/or the runner of the distributor) (see the Head Sistem of ignition).
Functioning of system of injection of the fuel/carburettor is broken (see the Head the Power supply system).
Losses of depression in system of injection, on the inlet pipeline or through connecting hoses - petrol models take place (see the Head the Power supply system).
Installation of valvate gaps is broken (see the Head Routine maintenance of the car), are perhaps damaged or jammed the valve(s) (see the Head Dvigatel).
During acceleration of the engine or at the movement uphill there are detonation sounds The car is fuelled not that grade.
Installation of a corner of an advancing of ignition is broken (see the Head Sistem of ignition).
The system of injection the fuel/carburettor needs adjustment (see the Head the Power supply system).
Spark plugs or VV of a wire are damaged, candles not of that type are perhaps established (see the Head Routine maintenance of the car).
Distributor components are worn-out or damaged (see the Head Sistem of ignition).
The system of decrease in toxicity of the fulfilled gases is faulty (see the Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Depression losses take place (see the Head the Power supply system).
The control lamp of pressure of oil continues to burn after successful start of the engine

Immediately kill the engine and find out a cause of failure. Operation of the engine with the lowered pressure of oil is fraught with its serious damages!

Oil level fell, or oil not of that grade is filled (see the Head Routine maintenance of the car).
Idling turns are excessively small (see the Head Routine maintenance of the car).
Short circuit in an electrical wiring takes place (see the Head Sistem of onboard electric equipment).
The oil pressure sensor switch is faulty (see the Head Dvigatel).
Bearings of the engine and/or the oil pump are worn-out (see the Head Dvigatel).
The engine continues to work after switching off of ignition Idling turns are excessively high (see the Head Routine maintenance of the car).
Working temperature of the engine is excessively high (see the Head the Cooling system).
The octane number of fuel does not correspond to technical characteristics of the engine.
Spark plugs are faulty, or adjustment of an interelectrode gap is broken (see the Head Routine maintenance of the car).