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93 GMC 4.3

Tiny
JERRYMATTHEWS
  • MEMBER
  • 1993 GMC C1500
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 280,000 MILES
Nter your question. I have tried everything the vehicle wont idle and the throttle will not accelerate. When it does it will pop out the exhaust pipes.I have replaced timing change, pickup in distributor cap, and roller button. Plugs and wires. Map sensor
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Tuesday, January 4th, 2011 AT 6:43 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check your fuel pressure if it's tbi it should be 9-11 psi. Then check for a blown gasket at base of tbi spray choke cleaner around it. Check vacuum line going to map sensor they get soft and suck together.
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Wednesday, February 9th, 2011 AT 1:49 AM

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