ENGINE PERFORMANCE PROBLEM1991 GMC TRUCK V8 ...

1991 GMC Truck

Tiny

jmeacham

May, 30, 2010 AT 8:42 PM

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

1 Answer

Tiny

obxautomedic

May, 31, 2010 AT 8:18 AM

Hello,

Here are some possible causes.

Plugged Fuel Filter

Weak Fuel Pump

Vacuum Leak

Plugged Exhaust System

.

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