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it could be a faulty pump, that allows gasoline or water into the pump motor... be careful, cuz it could cause issues, between sparks that could come from the motors bruses, and fumes. it could also be that the relay got wet, or got damp from it being in a high humidity place. hope this helps

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Q: 1988 Chevy PU 305 tbi changed fuel pump and relay now it cuts out at half throttle?
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