Question about 2000 Buick Regal

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Buick Regal dying

I have a 1998 Buick Regal GS supercharged. Engine starts and runs about 5 seconds then dies. Checked fuel pressure, turn key on, engine off, fuel pressure goes to 45 psi. Start engine, fuel pressure steadily drops to 20 lbs & engine dies. Fuel pump relay & fuse are good. Fuel lines look good ft to rear. Checked for power at fuel pump harness near fuel tank. Solid grey wire on 7 wire terminal has powere. Key on engine off power goes out when engine starts. Have replaced oil sending unit.
Any suggestions?

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  • 10 more comments 
  • ritawrite7 May 11, 2009

    Yes the fuel filter was changed. It was plugged but not severely.

  • ritawrite7 May 11, 2009

    It is an i or 1

  • ritawrite7 May 11, 2009

    Scanned computer, had no codes. Friend said to check reading on MAP sensor, said 90 or over KPA key on engine off through data stream would indicate bad macomputer uses this information to activate fuel relay speed control. KPA was 96, so had to order from dealer the map sensor & ordered a resister also, or what their calling a resister kit. You said resister is outside ft frame rail, is this behind inner fender near windsheild washer tank?

  • Anonymous May 11, 2009

    I found it! Looks like an old ballast resister. Twisted wires together...voilaaaa! Starts and stays running like a charm, now if I can return those parts ordered in from the dealer!
    Thanks so much!!!!!!

  • ritawrite7 May 11, 2009

    Thank you daves944!!!!!!

  • Dave  C
    Dave C May 11, 2010

    I have a wiring diagram for the "1" engine that shows a very elaborate fuel pump relay, actually two relays in one, one of them is called the "fuel pump speed control relay". This system utilizes a dropping resistor that is mounted "outside the right front frame rail" I'm kind of thinking that this system has a reduced current mode for normal driving and a boosted mode. It might be an idea to chase down this resistor and check it along with the associated wiring and connections. Also, it could well be a bad relay and when you're checking it you see the start up signal that would use the boosted mode, but when it switches over to the normal side, it's failing. I would try a new fuel pump relay, if it's this dual stage unit. it's going to be expensive.

  • Dave  C
    Dave C May 11, 2010

    What's the 8th digit of the vin?

  • Dave  C
    Dave C May 11, 2010

    It sounds like you have a severely plugged fuel filter, has it been changed yet?

  • arlene344
    arlene344 Oct 10, 2013

    where do i find the ballest resister

  • Anonymous Mar 20, 2014

    1998 regal I have a new battery and altinator but the battry dyes every night. pulled all fuses under the hood and inside. and it still happens. with all the fuses out and key off I still get a big spark when I disconnect the battery

  • Anonymous Mar 22, 2014

    Oil pressure is up and down but engine is running fine not losing power or making any noises would you say oil sending unit or oil pump?

  • Anonymous Mar 22, 2014

    Oil sending unit or oil pump??? It does not lose power or make any noises when all this is going on.

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  • Master
  • 1,050 Answers

You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

Posted on May 11, 2009

  • Dave  C
    Dave C May 12, 2009

    Just checking in, any further progress on the no-start, compression numbers?

  • Dave  C
    Dave C May 12, 2009

    Ooops, Sorry, I responded the the wrong person.

    Cheers,
    Dave


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