Question about 1988 Oldsmobile Delta 88

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Fuel pump fuse night mare

I have replaced the fuel pump, i have disconnected the alt, and the fuel pump still blow the fuse after the car starts, it will start and run for about 5 seconds the blows. It doesn't blow the fuse until you start it.

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  • mopar267 Dec 12, 2008

    Yes I have,

  • ovs5
    ovs5 May 11, 2010

    Have you checked the wiring to pump not shorting to earth from vibration of car when running due to chafed wire somewhere.

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It ended up being a bad oil pressure sending unit, it is in the power loop for the pump. When the oil pressure would come up when started that is when the fuse would blow. A friend who works for a mechanic in town found a diagnosis digram for the fuel pump and that is how we found out that the the oil pressure sending was in the wiring loop for the fuel pump

Posted on Dec 13, 2008

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