87' blazer s10,2.8l,tbi,157k mi.

1987 CHEVROLET TRAILBLAZER
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CURTHERRIN
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engine stalls after warm up loses voltage from computer to fuel pump relay,no fuel injected, i have done a head gasket job on it recently, also new fuel filter, new knock sensor, new plugs, wires, pickup coil, exhaust from y back, new air filter, reset timing, checked for correct vacuum hose routing, shows service engine soon light, no codes. did read a knock sensor, map sensor grounded, but cleared up after i hcanged the knock sensor. all started with fuel filter change out. now as soon as the engine comes up to normal operating temp, it stalls abruptly.
Apr 15, 2007 at 1:33 PM
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2CARPRO JACK
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If the Check engine light is on then it has a code or codes.Double check the grounds on the back of the cylinder heads.
Apr 16, 2007 at 7:48 AM