Question about 2000 Pontiac Grand Prix

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This problem started when driving, the car would lose all power and stall. After a few minutes it would start again and run rough, then smooth out. To go anyplace, this would happen 3 to 4 times. It did this for about two days. The car guy said because I did not get a "Check Engine Light" He could not give me even a guess. Then I tried having a new battery installed and now it will not idle unless I push the accelerator and hold it down. I was told by the ?AAA? Battery guy that all electrical systems checked out good.

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  • Henry Burley Oct 13, 2010

    1. It does not die quicker, it will miss a little then even out



    2. No Black smoke



    3. This is nuts because it would start back up. But now after the battery went dead and "AAA" guy

    gave me a new battery do to the old battery being damaged. It would start up but not idle unless I continued to push the accelerator down to maintain RPM's. This is why I say this it just nuts. Why would changing a battery cause such a different problem?



    4. If I don't maintain RPM's it will stall but start right back up again and run as long as I maintain high RPM's.



    I just am baffled.

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Hi, when a car dies and stalls or loses power while under power, it has to be related to the absence of fuel or spark. Here's a couple of questions you can answer that will help you find and fix your problem:

  1. What happens if you floor the accelerator? If the engine dies quicker, that would indicate a lack of fuel.
  2. Do you ever see black smoke coming from the tailpipe, if so when? This typically indicates the abundance of fuel or the lack of spark. Backfiring with black tailpipe smoke means the spark just came back, backfiring with no black smoke means a lean condition or the absence of fuel.
  3. When it dies, does it start right back up? If so, that usually means the problem is electrical 'cause the absence of fuel typically creates the need to crank the car longer until the fuel system re-primes its self.
  4. If it won't start right back up, if you let it sit for some minutes, will it now start? This usually indicates a bad fuel pump.
Since your car situation is associated with the fourth (4th) point, then you need to replace the fuel pump to solve the problem......

Posted on Oct 13, 2010

  • Tunde Autos
    Tunde Autos Oct 13, 2010

    Hi, from what you have explained here, it's a problem with the fuel filter which is dirty and also the fuel pump as i said earlier...

    One you don't maintain the RPM, it stalls. It is a problem that will be fixed by replace both device because Fuel filter is plugged or fuel line is cinked, after highway driving where fuel flow is greatest the pump cannot maintain the flow and engine "runs out of gas" once you cannot maintain RMP, the fuel line is full again by gravity

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