Question about 1993 Oldsmobile Bravada

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My 93 bravada wont start since i replaced sending unit

I have a 93 olds bravada that ran before, but leaked gas due to a rusted sending unit. i replaced it and also the car battery because it too was bad. i poured a few gallons into the tank and it wont start. car turns over just fine but will just not start. i dont really know how to check the fuel pump, i just assume its working because when i turn the car on it registers the correct fuel level and i know its a mechanism on the pump that reads that, so i just assume its fine. i dont know what could have happened between the time it ran fine, and the time i put a new sending unit on.

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  • w8emz4oi Sep 25, 2008

    the sending unit with wires are new, so im hoping thats not the problem. i tried turning the car on to hear the fuel pump without a gas tank or hoses attached, and theres nothing. the fuel pump doesnt hum or do anything. would that be enough to mean that the fuel pump doesnt work?

  • w8emz4oi Sep 27, 2008

    alright, i turned the car on and let it sit for a bit while on, no action from the pump. i tried starting it too to see if the pump would respond- nope. is there another way i can check to see if the pump is alright? or shouldnt it have responded by now.

  • w8emz4oi May 18, 2009

    well i gave up for a while and now have resumed this project. The fuel pump has no power. The sending unit and fuel pump relay all have power... so im replacing the pump... ill report back eventually



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Check for power at the sending unit should have power for 10 sec on i belive the purple wire and the other wire will have power all the time power for 10 sec is what u want for fuel pump power ahd if u have power u should be able to hear fuel pump if you have power and do not hear pump pull sender out and check connection from pump to sender also check fuel connection from pump to sender

Posted on Sep 24, 2008

  • pat  murray
    pat murray Sep 25, 2008

    i would check for battery voltage at the sender before condeming the pump should have battery for about 10 seconds when turning key on



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