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

1989 GMC S15
190,000 MILES
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GEEKFECK
  • MEMBER
  • 19 POSTS
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?
Nov 28, 2011 at 6:05 PM
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HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 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
Nov 28, 2011 at 8:00 PM
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