MY IS RUNNING EXTREMELY RICH AND BOTH SHORT TERM FUEL TRIMS ARE SHOWING 99.2 WITH NO CODES

2002 Jeep Liberty

Tiny

Cboswell

October, 21, 2011 AT 8:48 PM

It barely idles and is burning fuel worse a gas hog v8. I've scanned it with absolutely no luck. Any help would be greatly appreciated thanks

FOUND 111 RELATED QUESTIONS

2 Answers

Tiny

rasmataz

October, 26, 2011 AT 10:35 AM

Probable causes of an engine running rich are as follows: 1. Excessive fuel pressure can be cause by restricted fuel return line

2. Defective Oxygen Sensors.

3. Leaking injectors and fuel pressure regulator.

4. Coolant temperature sensor out of calibration.

5. Restricted air intake system

Tiny

Cboswell

October, 26, 2011 AT 2:01 PM

I found out Monday that it's only running on two cylinders. Fuel pressure is 55 pounds at idle. Map kpa is around 80

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