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When hot it dies when I put it in gear

Tiny
91GMCSONOMA
  • MEMBER
  • 1991 GMC SONOMA
  • 150,000 MILES
I have a 91 gmc sanoma 4.3 automatic. It idles fine in park and nuetral but dies when you put it in gear. But only when it gets hot. I've already replaced the alternator, battery, egr valve, throttle position sensor, idle air control valve, new wires plugs cap and rotor air filter. Please help me out.
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Monday, September 16th, 2013 AT 10:17 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fuel pressure first with a gauge if this is atbi unit then check under it for a vacuum leak as they blow the gaskets there. Spray choke cleaner under tbi front and back while idling. If it changes rpm it's leaking.
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Monday, September 16th, 2013 AT 10:36 AM
Tiny
91GMCSONOMA
  • MEMBER
  • 2 POSTS
Any other suggestions
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Tuesday, September 17th, 2013 AT 8:34 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you don't do what I suggested you have no where to find a good answer.
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Wednesday, September 18th, 2013 AT 6:07 AM

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