Engine Diagnosis - Overview: Overview BMW Z3 E36 рестайлинг

When attempting to diagnose driveability complaints, always consider the basics. Regardless of the level of technology employed on an engine, it still needs a few basic things to occur in order to run properly. Whether the engine is very basic or uses so-called "New Generation" technology always refer to the basic principles first.

Any engine using four-cycle spark-ignition principles must meet the same fundamental conditions to run properly. Most engine related driveability problems fall into a few basic categories

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1. No Start/No Crank
2. Extending cranking before engine start
3. Rough Running Cold Idle
4. Rough Running Warm Idle
5. Rough Running Under Load
6. Lack of Power
7. Check Engine Light (MIL)

When referring to engine basics, all engines need fuel, air and spark to run. However, in order for a spark-ignition engine to run properly, a few things must be taken into consideration. The fuel, air, spark principle can be broken down further into the following categories

Scheme 144

1. Sufficient engine compression with a leak-free combustion chamber.
2. Sufficient amount of ignition voltage (spark) at the correct time.
3. Proper fuel pressure and volume.
4. Properly functioning fuel injection system (Engine management).
5. Properly functioning air management system (Electronic throttle systems).
6. Correct valve timing (VVT and VANOS).