Question about 1999 Chevrolet S-10 Pickup
When I am driving, it shuts off for a split second, then it keeps going. sometimes it turns off and fuel pump will not turn on. Started & alternator are fine. I thought it was the fuel pump & I replaced it with a new pump and fuel filter, but made no difference. Could it be computer related?
Sounds like the "run" fuel pump relay is going bad. This truck should have two different fuel pump relays on it. One for the start cycle and one for run. They should be in the fuse block under the hood. I don't know which one it is though but you should be able to tell by feeling them while someone else cycles your keys on and off. Note that if the fuel pump has already pressurized the fuel line it may not kick on when you turn the key.
Posted on Aug 02, 2008
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Posted on Jan 02, 2017
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If your oil pressure gets to low it can turn off the fuel pump. This may also have saved your engine. The ECM turns on the fuel thru the fuel pump relay for about 5 seconds. When engine is running oil pressure sender supplies the voltage to the pump. When engine shuts off check oil pressure and voltage to fuel pump.
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