stalls when engine is warm

1989 GMC SUBURBAN
50,000 MILES
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MARCELMARCEL
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Starts and runs perfect for about 10 to 15 minutes, once the engine is warm it stalls. It will start back up after it has cooled down about 45 minutes. I have replaced the coil, fuel pump, distributor and everything in it, the wiring harness and plug going to the distributor. New computer, all temp sensors and every device of the smog system. When it won’t start there is no fuel or spark. Doesn’t throw any codes. It’s a 454 TBI fuel injected headache..
Oct 12, 2011 at 3:36 AM
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JACOBANDNICKOLAS
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Have you checked the ASD relay?
Oct 12, 2011 at 3:42 AM
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MARCELMARCEL
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No I havent,I dont belive this car has one. But if there is one would you happen to know where I might find it?
Oct 12, 2011 at 3:49 AM
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JAMILBRODT
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check the crank sensor. the check engine light might not come on because the computer does not see the problem for what ever time it takes for it to realize hey there is a problem. or you might have to find a really good scan so you can watch components data while it is running and when it shuts off and see whats going on.
Oct 12, 2011 at 3:51 AM
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JACOBANDNICKOLAS
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You know, I would say yes, it has one. However, I just spent the last 15 minutes looking for its location on Mitchel. Even though it is listed, I can not find a wiring schematic showing it.
Oct 12, 2011 at 4:04 AM
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MARCELMARCEL
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There is no crank position sensor on this car I have been looking for the ASD relay In the Haynes book but no luck. I'll keep looking online. This problem has he going crazy.Thanks for all your help.
Oct 12, 2011 at 4:20 AM
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ASEMASTER6371
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Joe, it does not have one. Just a fuel pump relay.

Just to add, I have seen that the throttle body gasket leaks vacuum and causes a stalling issue. check it to see if there is any leaking by spraying some carb cleaner around the base and if it changes the idle up or down, replace the gasket.

Roy
Oct 13, 2011 at 1:39 AM
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JACOBANDNICKOLAS
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Thank you, ASE. Mitchel lists them everywhere for this vehicle but doesn't show anything in wiring schematics or locations. It drove me crazy!!!
Oct 13, 2011 at 1:42 AM
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ASEMASTER6371
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yep, remember, we are working with engineers. lol
Oct 13, 2011 at 1:49 AM
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