E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 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. Good advice
   14.2. 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 the trailer
   14.6. Preparation of the car for winter
   14.7. Rule 35
   14.8. Choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Emergence in deposit oil
   14.12 whether. It is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is rather live, than it is dead …
   14.15. It is not got - good advice
   14.16. Visit to car-care center
   14.17. A gear belt for a drive of the mechanism of a gazoraspredeleniye
   14.18. Wear of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   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. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know upon purchase of the air filter
   14.27. Engine overheat
   14.28. That it is necessary to know to the owner of the car with the injector engine
   14.29. Accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. Catalyst
   14.34. Rub in one - or how to save the catalyst
   14.35. Probuksovochka
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. ABS: natural choice
   14.40. Rims
   14.41. We update rims
   14.42. Scheme of marking of a car tire
   14.43. Metal corrosion
   14.44. Automake-up
   14.45. What creaks?
   14.46. Hatch
   14.47. Safety cushion: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Galogenki"
   14.52. About the correct adjustment of headlights
   14.53. Electric motor
   14.54. From change of places "composed" changes nothing?


14.28. That it is necessary to know to the owner of the car with the injector engine


Injector motors surpass carburetor in many parameters, to take at least their profitability and problemless start in a frost. Nevertheless, carburetor under our conditions sometimes appear more advantageous. And even some automakers deliver on our market of the car with such engines. Everything put – as gasoline which sell at us.

The injector engine is calculated on high-grade gasoline which on our fillings you will find not often. Besides, different systems of injection have the specific features, they are necessary for considering at car operation. 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 can and not notice such malfunction: on the dashboard there is no alarm signal, and the engine continues to work (but any more in an optimum mode). Similar quite often it happens in "Audi-80" with the central injection. About a third of the motorists having such cars, do not guess at all that go in emergency operation. And it conducts to the increased fuel consumption, decrease in capacity, rough operation of the engine and the complicated start-up. Malfunction comes to light only during the next servicing. Therefore on the "weak" places of each system which are showing under our conditions, it is necessary to dwell.

Systems with mechanical injection. They more than others, are subject to physical wear. The regulator of pressure of fuel refuses usually through 80–120 thousand km of run (engine start considerably worsens), nozzles – through 60–80 thousand (rough operation of the motor, the increased fuel consumption). Refusal of nozzles is especially artful, as it not at once will notice. Diagnosing and repair need special equipment.

Sore point of systems with electromechanical injection – подсос air 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.

Electronic systems have problems. For example, the accumulator "sat down", and you on an old habit decided to "light" from other car. The electronic block as a result fails. And application of etilirovanny gasoline will be put, in turn, out of commission by a lambda probe and the catalyst.

As a whole, 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, the reasons for failure of any system at us, alas, more than in Western Europe or America: poor-quality gasoline, dirt on roads and chemicals with which them strew. Therefore it is necessary to listen to recommendations of experts. Try to use import gasoline if there is such possibility; for moisture removal from топливопроводов at each filling fill in in a tank a special preparation; through each 10 000–15 000 km of run do complete washing of system of injection.


One more feature: any failure fixes the computer. And even after replacement of a faulty detail it will give out incorrect teams – until failure "will not erase" at the special stand.