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My GMC (89 s-15 2WD pu 4.3 liter) starts but almost as quickly stalls. Why?

Tiny
GEEKFECK
  • MEMBER
  • 1989 GMC S15
  • 190,000 MILES
I have replaced the fuel pump, fuel filter, and checked the operation of the fuel pump relay (fine). It still starts then stalls. I just changed plugs, cap, rotor. It ran well for 2 weeks then it started this fuel/ignition issue. What should I check next?
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Monday, November 28th, 2011 AT 6:05 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check your tbi connectionsontopfor good connections or not broken. Then spray choke cleaer around the bottom of the tbi unit to see if there is a leak, probably is as these blew the gasket under the bi unit and leaked vacuum
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Monday, November 28th, 2011 AT 8:00 PM

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