1990 GMC Safari motor running rough

1990 GMC SAFARI
180,000 MILES
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DALLASIGOOD
  • MEMBER
  • 1 POST
when starting van motor runs rough. sometimes it runs better but most of the time it will run rough.
feels like not getting enough fuel to the motor. I have a tune up,air filter, fuel filter, blown out fuel lines, new battery, what else is their to look at. the fuel pump sounds like it kicking on.
Sep 28, 2013 at 11:09 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
scan for codes and check fule pressure with a gauge if tbi should be 9-11 psi. check base of tbi with choke cleaner for vacuum leak as they blow out gaskets. and cause a vacuum leak.
Sep 28, 2013 at 11:29 PM
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