ENGINE MECHANICAL PROBLEM2002 JEEP GRAND ...

2002 Jeep Grand Cherokee

Tiny

rex carter

October, 12, 2010 AT 11:05 PM

Engine Mechanical problem
2002 Jeep Grand Cherokee 4 cyl Four Wheel Drive Automatic 145000 miles

hard to start backfires through throttle body exhaust smells rich

FOUND 3593 RELATED QUESTIONS

1991 Hard To Start

41 ANSWERS
4 IMAGES

Engine Does Not Stay Running

33 ANSWERS
8 IMAGES

1 Answer

Tiny

rasmataz

October, 13, 2010 AT 12:46 AM

Probable causes of an engine running rich are as follows: 1. Excessive fuel pressure can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.

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