Question about 2004 Pontiac Grand Prix

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2004 Pontiac Grand Prix Engine Problem

Recently, my 2004 Grand Prix will stall when driving long distances on the highway. The engine just shuts off. I let it sit for about 5-minutes and after pumping the gas (alot) the car will restart and run fine until I drive long distance. I've had a garage pressure test the fuel pump and check for error codes, but nothing was found. I have an extended warranty, but they won't cover the work unless it can be diagnosed or fails. Any thoughts on what else I can check?


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  • Anonymous Dec 02, 2008

    i have the same problem on my 2004 grand prix. when the engine is hot , it will stall and i have to wait for the engine to cool down before i can start again, i took to the garage but their could not fix it . so i check the fuse panel , i press down the fuel fuse and the fuel fuse relay make sure it's no bad contact , since that i never have problem again , try to check it see how it goes.

  • Karinthashaw Dec 09, 2008

    I have a 2004 grand Prix......the windsheild wiper fluid will not come out, but it is full.....what can I do?

  • hb1974 Jan 28, 2009

    My 2004 Pontiac Grand Prix GT's temperature gauge is not working at all. When I start the car, it kinda hesitates but not too long and I'm wondering if it has something to do with it. My check engine light is on also and just started recently. Please help.

  • Anonymous Mar 27, 2014

    Replaced fuel pump car wont start unless you spray it with carb cleaner then it will start and stay running then you can shut it off and will restart every time you turn key runs and drives fine but let it sit for more than three hours you have to spray it again for it to start then its fine again until you let it sit holds 55 psi fuel pressure and doesn't bleed off no codes have checked everything inj pulse spark etc. Any Ideas????



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Sounds like a crank sensor, my cousin had the same problem

Posted on Dec 25, 2008

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I think it sounds like a MAP sensor... try it if u havent figured it out already yet...,868181/vehicleId,2915702/initialAction,partProductDetail/store,713/partType,00127/shopping/partProductDetail.htm

Posted on Dec 01, 2008


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1 Answer

My 2004 pontiac grand prix stalls and randomly shut off but will always restart

Does it stall at idle or going down the highway? How long since a tune-up? Can you check for applicable trouble codes? Some of the national brand auto stores will check codes for free.
Use a gage and check proper fuel pressure. Intermittent issues can be hard to track. If a code is set, maybe freeze frame data will show what was going on when it stalled?

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Stalling issues

Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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