Mechanics

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

2002 Jeep Liberty • 120,000 miles

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
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Cboswell
October 21, 2011.




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
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Rasmataz
Oct 26, 2011.
I found out Monday that it's only running on two cylinders. Fuel pressure is 55 pounds at idle. Map kpa is around 80

Tiny
Cboswell
Oct 26, 2011.

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