1991 GMC TRUCK

  • Tiny
  • jmeacham
  • 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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Sunday, May 30th, 2010 AT 8:42 PM

1 Reply

  • Tiny
  • obxautomedic
  • Expert
  • 3,751 posts

Hello,

Here are some possible causes.

Plugged Fuel Filter

Weak Fuel Pump

Vacuum Leak

Plugged Exhaust System

.

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Monday, May 31st, 2010 AT 8:18 AM

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