Long Cranking With "Wet" Start

General
Information: Long Cranking with "wet" start

Symptoms:

Long Cranking accompanied with rough running, black exhaust smoke, a heavy fuel smell, spark plugs may be wet and engine oil might have fuel smell. Complaint may be more severe in high altitude areas as air oxygen content decreases.

Special Note for Service Advisors/Service Managers:

Customers should be advised to depress the accelerator pedal approximately halfway before and during engine starting in mountainous areas.
Troubleshooting Hints:

- Function of evaporative system. The evaporative purge valve must be closed during engine cranking.
- Spark plugs (type, condition, proper gap).
- NTC coolant temperature sensor (nominal values).
- Poor starting and/or running combined with temperature gauge fluctuation may be a product of moisture having entered the injector harness multiplug. See S.I. 12 05 89 (1862) concerning E30, C191 (E34 x 1563) multiplug moisture.
- Electro-mechanical function of injectors.
- Check injectors for leakage as outlined on pages 3, 4 and 5.