Question about 2004 Pontiac Grand Prix

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I have a 2004 grand prix and when starting it doesnt' always start until you press down on the gas peddle. and then it will catch and start, no check engine light has come on and we have gone through 2 tanks of gas so it is not bad gas.??

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Check your fuel filter, it may be partially plugged

Posted on Jul 15, 2009

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I have one that did that too run some good injector cleaner

Posted on Jul 21, 2009

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I have a 2004 grand prix, When you are driving down the highway, and you take foot off gas, there is vibration


Hi Cheyenne:
- For the vibration, I'd be checking universal joints or CV jounts.
- Sounds like you've got your brakes figured out already. Time for some maintenance.

Dec 08, 2015 | 2004 Pontiac Grand Prix

1 Answer

2004 Pontiac Grand Prix GT wont start unless i press gas pedal


I had a similar prob where I needed to hit the gas to start my car, turned out the throttle body was all gummed up, after fishing it out, problem went away..

Oct 07, 2012 | 2004 Pontiac Grand Prix

1 Answer

2004 seems to loose fuel pressure periodically while driving down the road


i have a supercharger in mine and if i run less than superios gas it will do this as well, good bet use shell premium gas and that should stop if it doesnt try replacing your fuel filter its just under the body of the car at the front edge of the driver side door :)

Dec 14, 2011 | 2004 Pontiac Grand Prix

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When i take my foot off of the brake and don't


Sounds like your throttle body is dirty. This is the first year GM modified the 3.8 with an aluminum intake and a "motor sensor in the throttle body".
No codes will come on as the computer wont pick up the issue. It will also be hard to start on occasion when warm.
Dealer will clean it only if you instruct them to. (about and 80 dollar fix if that's what it is)
Money well spent as even if this doesnt cure it you will eventually need to do this anyway.
That's assumiong you have changed your gas filter air filter and plugs (GM only)

Dec 17, 2009 | 2004 Pontiac Grand Prix

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