Mechanics

GMC TRUCK ENGINE PROBLEM

1991 GMC Truck

Engine Performance problem
1991 GMC Truck V8 Four Wheel Drive Automatic

tbi 350 engine idle is too high and also revs up and down not giving any engine codes
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Jmeacham
May 30, 2010.



Hello,

Here are some possible causes.

Plugged Fuel Filter

Weak Fuel Pump

Vacuum Leak

Plugged Exhaust System

.

Obxautomedic
May 31, 2010.