Question about 1992 Oldsmobile Cutlass

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No power to the fuel pump

New pump, switched the relay, it will rum with a hot wire from the pos of the batt to the pump any ideas?

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  • puman1970 Dec 11, 2008

    this was a help but all that is working good I'm thinking ecm what is you thought on that?

  • Anonymous Mar 26, 2014

    86 6.2 diesel 4x4 alt freaked out gauge went pos to neg rapidly. Then no power batts and wires were hot to touch. No power when ign switch turned on.

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Sounds like you either have a bad relay or wiring issue here. First I would check to make sure your fuel pump fuse isnt blown 2.) Get a multimeter and check to see if you get power from the relay. 3 check to make sure you are getting a good ground the fuel pump. 4 check to make sure you are getting power to the relay. 5) Check to make sure you have a good relay. Hope this gives you some direction. Thanks for Using FixYa!

Sincerely,

JC

Posted on Nov 28, 2008

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Engine Starts:

· Fuel Pump secondary circuit shorted to power

· Fuel pump relay contacts always closed

· Open in fuel pump monitor (FPM) circuit between ECU and connection to POWER TO PUMP circuit

· Heated Exhaust Gas Oxygen (HEGO) sensor shorted to power

· faulty ECU

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If all the above is working as designed, them you probably have a bad fuel pump.

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