Audi 100/A6

1990-1997 of release

Repair and car operation

14.8.9.4. Malfunctions of a diesel engine with fuel equipment Bosch

THE GENERAL DATA

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

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

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
Faults in engine work under loading	1, 2, 4, 5–10, 16, 22
Falling of capacity of the engine	1, 4–7, 9, 10, 11, 13, 15, 16, 19–22
The raised expense of fuel	7, 9, 10, 11, 13, 15, 16, 19–22
The engine does not stop	3, 21, 22
Low приемистость, an exhaust with a black smoke, falling of capacity of the engine	2, 5, 9, 10, 11, 13, 19–22
Grey 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. Air presence 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 giving 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 adjournment in the fuel filter	To replace the filter, to use seasonal fuel.
9. A wrong advancing of injection of fuel	To adjust an initial corner of an advancing of injection of fuel.
10. Nozzles of atomizers 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. It is littered or faulty перепускной the valve	To clear the calibrated channel or to replace the valve.
17. Негерметичен the delivery valve (on a four-cylinder diesel engine) or two valves (on six-cylinder)	To replace the valve ().
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. It is faulty муфта advancings of giving of fuel	To repair or replace муфту.
20. A 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.