Audi 100/A6

1990-1997 of release

Repair and car operation

The provided table of possible defects on a diesel engine is made by Bosch firm, and we hope that it will help you to return your engine to a working order.

The table of malfunctions and methods of their elimination on a diesel engine with fuel equipment of Bosch firm

MALFUNCTION	CODES OF THE POSSIBLE REASONS
The complicated start-up	1–9, 12, 13, 20, 22
Unstable idling	1, 2, 14, 18, 21, 22
Non-uniform idling of the heated-up engine	2, 10, 13, 17, 20, 22
Interruptions in operation of the engine under loading	1, 2, 4, 5–10, 16, 22
Engine capacity falling	1, 4–7, 9, 10, 11, 13, 15, 16, 19–22
The increased fuel consumption	7, 9, 10, 11, 13, 15, 16, 19–22
The engine does not stop	3, 21, 22
Low acceleration performance, exhaust with a black smoke, engine capacity falling	2, 5, 9, 10, 11, 13, 19–22
Gray exhaust at the maximum loading (white or blue)	1, 2, 4, 5, 8, 9, 13, 19, 22
Abnormal minimum and maximum turns of idling	14, 15, 18, 21
The engine is not dispersed	1, 2, 4, 6, 8, 9, 10, 19, 20, 21
The fuel pump of a high pressure overheats	16

MALFUNCTION	ELIMINATION METHODS
1. The empty fuel tank or is littered the ventilating valve of a tank	To fill a tank, to wash out топливопроводы, to clear the ventilating valve.
2. Availability of air in fuel system	To pump over fuel system, to eliminate подсос air.
3. The electromagnetic valve of a diesel engine or a regulator of starting supply of fuel is faulty	To repair or replace.
4. The fuel filter is littered	To replace the fuel filter.
5. Are littered топливопроводы low pressure	To restore sections through passage топливопроводов.
6. Are littered топливопроводы low pressure	To wash out or replace топливопроводы.
7. Leaky connections, топливопроводы leak or are broken	To tighten connections, to eliminate a leak.
8. Paraffin deposits in the fuel filter	To replace the filter, to use seasonal fuel.
9. Wrong advancing of injection of fuel	To adjust an initial corner of an advancing of injection of fuel.
10. Nozzles of nozzles are faulty	To repair or replace.
11. The air filter is littered	To replace filtering element.
12. The system of prestarting heating is faulty	To replace faulty starting candles.
13. Injection distribution on cylinders does not correspond to an order of their work	To rearrange топливопроводы a high pressure in a demanded order.
14. Abnormal turns of idling	To adjust the screw idling turns.
15. Abnormal maximum turns of idling	To adjust the screw the maximum turns of the engine.
16. The valve is littered or faulty perepuskny	To clear the calibrated channel or to replace the valve.
17. The delivery valve (on a four-cylinder diesel engine) or two valves (on six-cylinder) is not tight	To replace the valve (ы).
18. The effort of a buffer spring of a regulator of frequency of rotation of a diesel engine is not adjusted	To adjust effort of a buffer spring.
19. The coupling of an advancing of supply of fuel is faulty	To repair or replace the coupling.
20. Low compression	To restore a compression.
21. The regulator of frequency of rotation of the engine is faulty or is not adjusted	To adjust or replace a regulator.
22. The fuel pump of a high pressure is faulty or does not give in to adjustment	To remove the pump and to give to repair.