BMW 3 Series E30
since 1983-1994 release
Repair and operation of the car
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
- 14. Useful tips
14.2. The changed numbers
14.3. Purchase of the old car or mysterious set of figures and letters
14.4. Durability of the car
14.5. About parallelism of bridges of the car and trailer
14.6. Preparation of the car for winter
14.7. Rule 35
14.8. Choice of the used car
14.9. Engine oils
14:10. What needs to be known, changing oil
14:11. Emergence in deposit oil
14:12. Whether it is possible to mix import oils?
14:13. "Eats" much, but quietly goes
14:14. It is rather live, than is dead …
14:15. It is not got - useful tips
14:16. Visit to car service
14:17. A gear belt for the gas distribution mechanism drive
14:18. Wear of pistons
14:20. Bearings of engines
14:21. Pollution of the engine
14:22. As the conditioner works and what to do if it failed
14:23. Conditioner: not only "pluses", but also "minuses"
14:24. Rules of service of the conditioner
14:25. Antifreeze you should not disturb with antifreeze …
14:26. What should be known upon purchase of the air filter
14:27. Engine overheat
14:28. What should be known to the owner of the car with the injector engine
14:30. Possible malfunctions of the rechargeable battery
14:31. What to do with the failed generator
14:32. The belt is guilty, and we blame the generator
14:34. Rub in one - or how to save the catalyst
14:36. Features of operation of the brake system
14:37. Malfunctions of the brake system
14:38. Brake fluids
14:39. ABS: natural choice
14:41. We update rims
14:42. Scheme of marking of a car tire
14:43. Metal corrosion
14:45. What creaks?
14:47. Safety cushion: troubles or pleasures?
14:48. We fit well?
14:49. Anticreeping "immunodeficiency"
14:50. Why headlights grow dull
14:52. About the correct adjustment of headlights
14:53. Electric motor
14:54. From change of the places "composed" nothing changes?
Injector motors surpass carburetor in many parameters, to take at least their profitability and trouble-free start in a frost. Nevertheless, carburetor under our conditions sometimes are more advantageous. And even some car makers deliver on our market cars with such engines. Everything put – as gasoline which is sold at us.
The injector engine is calculated on high-grade gasoline which at our gas stations you will find not often. Besides, different systems of injection have the specific features, they need to be considered at operation of the car. And in our market there is a lot of such systems: with mechanical injection "To (KE)-Jetronic", electromechanical "L-Jetronic" and electronic – "Motronic", "Lucas", "Marelli".
Many systems have two operating modes: the main and emergency – at malfunction of one of sensors. The driver cannot notice such malfunction: on the dashboard there is no alarm signal, and the engine continues to work (but not in the optimum mode any more). Similar quite often happens in "Audi-80" to the central injection. About a third of the motorists having such cars do not even guess that they go in emergency operation. And it leads to the increased fuel consumption, power deceleration, uneven operation of the engine and the complicated start-up. Malfunction comes to light only during the next servicing. Therefore it is worth dwelling upon the "weak" places of each system which are shown under our conditions.
Systems with mechanical injection. They more than others, are subject to physical wear. The regulator of pressure of fuel fails usually through 80–120 thousand km of a run (start of the engine considerably worsens), nozzles – through 60–80 thousand (uneven operation of the motor, the increased fuel consumption). The refusal of nozzles is especially artful as not at once you will notice it. Diagnosing and repair require the special equipment.
Sore point of systems with electromechanical injection – an air suction through the numerous vacuum hoses tending to cracking after 4–5 years of service. In particular on BMW and, in a little smaller degree, on "Audi". To reveal such defect quite difficult.
At electronic systems – the problems. For example, accumulator "sat down", and you on an old habit decided "to light" from other car. As a result the electronic block fails. And use of ethylated gasoline will be put, in turn, out of commission by a lambda probe and the catalyst.
In general, both mechanical, and electronic systems of injection have the pluses and minuses. At mechanical the thicket is refused by gasoline pumps and batchers distributors. At electronic the gasoline pump is more durable and is cheaper, but any malfunction of the computer will cost much. Besides, we, alas, have more reasons for failure of any system, than in Western Europe or America: low-quality gasoline, dirt on roads and chemicals with which they are strewed. Therefore it is worth listening to recommendations of experts. Try to use import gasoline if there is such opportunity; for removal of moisture from fuel-supply lines during each filling fill in special medicine in a tank; through each 10 000–15 000 km of a run do full washing of system of injection.
One more feature: any failure fixes the computer. And even after replacement of a faulty detail it will issue incorrect commands – until not to erase" failure at the special stand.