Question about 2004 Pontiac Grand Prix

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When I go to start my 04 grand prix it sounds like its going to start fine then it just dies. If I push the gas a little as I turn the key it revs up and starts fine. What's the deal?

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Take a long look at the throttle position sensor and idle air control. Before starting push the accelerator pedal all the a way to the bottom of travel and release quickly. Now try to start. Sometimes the ECU loses track of where the TPS is and pressing the gas pedal on full and releasing can sometimes help reset things. One thing you must do is clean the interior of your throttle body by disconnecting the air ducting and getting in there with a cloth soaked in WD40. If you have an idle air control valve mounted on the throttle body remove it and clean the associated passageways and valve interior. Reassemble and you should notice a difference

Posted on Nov 11, 2010

  • glenn crews Sep 02, 2013

    I have an 04 Grand Prix. Had the exact same problem. I cleaned the throttle body, intake , and MAF sensor. Runs like a charm now. No more stalling when I first start it. It took a whole 15 minutes.

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It could be that your fuel pressure regulator is not working good, which should be checked, it could be the diaphram is leaking. You should never have to touch the gas pedal on a fuel injected vehicle. Also could be a problem with the throttle body, or the mass airflow sensor. If you have a check engine light on have it looked at.

Posted on Nov 12, 2010

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