Peugeot 406

since 1996 release

Repair and operation of the car



Peugeot 406
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling systems, heating and ventilation
+ 5. Fuel system
+ 6. System of ignition
+ 7. Coupling
+ 8. Transmissions
+ 9. Power shafts
+ 10. Brake system
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
- 14. Main malfunctions
   14.1. Engine
   14.2. Cooling system
   14.3. Fuel system and system of production of exhaust gases
   14.4. Coupling
   14.5. Mechanical transmission
   14.6. Automatic transmission
   14.7. Power shafts
   14.8. Brake system
   14.9. Suspension bracket and steering





14. Main malfunctions

14.1. Engine

GENERAL INFORMATION

At start of the engine the crankshaft does not rotate:

 – accumulator plugs are unreliably connected or oxidized;
 – the accumulator is discharged or faulty;
 – violation of integrity of an electrical wiring in a starter chain;
 – the traction relay of a starter is faulty;
 – the starter is faulty;
 – teeths of a gear wheel of the drive of a starter or teeths of a gear wreath of a flywheel are worn-out;
 – the tire of grounding of the engine on the car case is disconnected.

The crankshaft rotates, but the engine is not started:

 – there is no fuel in a tank;
 – the accumulator is discharged (the crankshaft rotates very slowly);
 – are unreliably fixed or oxidized the accumulator plug;
 – elements of system of ignition (petrol engines) are damaged;
 – the wrong gap in spark plugs (petrol engines);
 – the system of prestarting heating (diesel engines) is faulty;
 – damage of system of injection of fuel (petrol engines);
 – the electromagnetic valve blocking fuel supply (diesel engines) is faulty;
 – air in fuel system (diesel engines);
 – mechanical malfunction of system of gas distribution.

Unstable start of the cold engine:

 – the accumulator is discharged;
 – accumulator plugs are unreliably connected or oxidized;
 – failure or interelectrode gaps in candles (petrol engines) are incorrectly adjusted;
 – the system of prestarting heating (diesel engines) is faulty;
 – the system of injection of fuel (petrol engines) is damaged;
 – damage of system of ignition (petrol engines);
 – a low compression in cylinders.

Unstable start of the hot engine:

 – the filtering element of the air filter is polluted;
 – damage of system of injection of fuel (petrol engines);
 – a low compression in cylinders.

At inclusion of a starter there are extraneous noises:


 – teeths on a gear wheel of a starter or a gear wreath of a flywheel are worn-out or broken;
 – bolts of fastening of a starter are absent or are unreliably tightened;
 – wear or damage of details of a starter.

Engine stop after start:

 – unreliable connection of elements of system of ignition (petrol engines);
 – an air suction in system of injection or an inlet collector (petrol engines);
 – damage of system of injection of fuel (petrol engines).

Unstable power setting idling:

 – the filtering element of the air filter is polluted;
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – the interelectrode gap is incorrectly adjusted or spark plugs (petrol engines) are worn-out;
 – an uneven or low compression in cylinders;
 – cam-shaft cams are worn-out;
 – the gear belt of the drive of the mechanism of gas distribution is incorrectly established;
 – damage of system of injection of fuel (petrol engines);
 – nozzles (diesel engines) are faulty.

Admissions of ignition idling:

 – the interelectrode gap is incorrectly adjusted or spark plugs (petrol engines) are worn-out;
 – defective high-voltage wires (petrol engines);
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – damage of system of injection of fuel (petrol engines);
 – nozzles (diesel engines) are faulty;
 – an uneven or low compression in cylinders;
 – hoses of ventilation of a case of the engine were disconnected or are untight.

Admissions of ignition in all range of turns of the engine:

 – the fuel filter is polluted;
 – it is faulty or the low pressure of supply of fuel the fuel pump;
 – the drainage opening of the fuel tank or fuel-supply lines is hammered;
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – the interelectrode gap is incorrectly adjusted or spark plugs (petrol engines) are worn-out;
 – the ignition coil (petrol engines) is faulty;
 – the nozzle (diesel engines) is faulty;
 – the distributor breaker cover (petrol engines) is faulty;
 – an uneven or low compression in cylinders;
 – damage of system of injection of fuel (petrol engines).

Vibration of the engine at acceleration:

 – the interelectrode gap is incorrectly adjusted or spark plugs (petrol engines) are worn-out;
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – damage of system of injection of fuel (petrol engines);
 – the nozzle (diesel engines) is faulty.

Unstable operation of the engine:

 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – the fuel filter is hammered;
 – malfunction or low pressure of supply of fuel fuel pump (petrol engines);
 – the drainage opening of the fuel tank or fuel-supply lines is hammered;
 – damage of system of injection of fuel (petrol engines);
 – nozzles (diesel engines) are faulty.

Low return of engine capacity:

 – the gear belt of the drive is incorrectly established;
 – the fuel filter is hammered;
 – it is faulty or the low pressure of supply of fuel the fuel pump;
 – an uneven or low compression in cylinders;
 – the interelectrode gap is incorrectly adjusted or spark plugs (petrol engines) are worn-out;
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – the system of injection of fuel (petrol engines) is faulty;
 – nozzles (diesel engines) are faulty;
 – the moment of injection of fuel of the fuel pump (diesel engines) is incorrectly determined;
 – jamming of brakes;
 – coupling pro-slipping.

Backfires in the engine:

 – the gear belt of the drive of the mechanism of gas distribution is incorrectly established;
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – damage of system of injection of fuel (petrol engines).

Low pressure of oil in the engine:


 – low level of oil or its wrong grade;
 – the oil pressure sensor is faulty;
 – bearings of the engine or the oil pump are worn-out;
 – engine overheat;
 – the safety valve of pressure of oil is faulty;
 – the mesh filter of an oil receiver is polluted.

The engine works after switching off of ignition:

 – an excessive deposit in combustion chambers;
 – engine overheat;
 – damage of system of injection of fuel (petrol engines);
 – the electromagnetic valve of a stop of the engine (diesel engines) is faulty.

Noise in the engine

Detonation in the engine at acceleration:

 – the ignition advancing corner (petrol engines) is incorrectly established;
 – the type of spark plugs does not correspond to demanded;
 – low octane number of fuel;
 – an air suction in system of injection, an inlet collector or hoses (petrol engines);
 – an excessive deposit in combustion chambers;
 – damage of system of injection of fuel (petrol engines).

The whistling or rattling noise:

 – the inlet collector or laying of a throttle (petrol engines) is untight;
 – laying of a final collector is untight;
 – vacuum hoses are untight;
 – laying of a head of the block of cylinders is punched.

The jingling noise:

 – the valvate mechanism or a cam-shaft is worn-out;
 – wear of auxiliary elements of the engine (water pump, generator, etc.).

Detonation or deaf noise:

 – bearings of the lower head of a rod are worn-out (noise decreases under loading);
 – radical bearings are worn-out (noise increases under loading);
 – blows to the piston (especially on the cold engine);
 – auxiliary elements of the engine (the water pump, the generator, etc.) are faulty.





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