Mechanics

CAN'T FIND THE PROBLEM

1991 GMC Acadia • V8 4WD Automatic • 160,000 miles

I put several new parts on my 91 gmc sierra and still can't keep it from flooding
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Rickey crawley
December 12, 2010.



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.

Rasmataz
Dec 12, 2010.