2004 Pontiac Grand Prix

Tiny
VEGADAN
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 98,500 MILES
I recently purchased a 04 Grand Prix and noticed the car had a problem starting when the engine was somewhat warm, I have no check engine lights on and everything else seems fine. I can at startup bearly touch the accelerator pedal and this seems to help the car start.I have seen this before on grand prixs but couldnt fix nor could my machanic, Any thoughts would be appreciated
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Saturday, January 3rd, 2009 AT 9:46 AM

4 Replies

Tiny
IMPALASS
  • EXPERT
Hello -

To better assist you can you tell me if your model is a GT or GTP. Also what is the size of your engine in liter and the 8th digit of your VIN?

I know you don't have a check light, but if you would, please go to Auto Zone (AZ) or O'Reilly's (OR) and for FREE they can pull the codes to the car. Most important: Once they check your codes, if they find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery and alternator.
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Saturday, January 3rd, 2009 AT 10:18 AM
Tiny
VEGADAN
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This car is a GT2, has a 3.8 V6 motor, and the 8th digit of the VIN is 2. I also tested it as you asked with a INNOVA 3100 tester and no code showed up. What do you think?
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Saturday, January 3rd, 2009 AT 10:53 AM
Tiny
IMPALASS
  • EXPERT
Hello -

I will do some checking since you have no codes. Can you still go to AZ and get the battery alternator checked.
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Saturday, January 3rd, 2009 AT 12:54 PM
Tiny
IMPALASS
  • EXPERT
Hello -

Also, pull the vacuum line off of our fuel regulator and see if there is fuel in it.

The next time this happens. Turn the key on and off several times but wait about 2 seconds in between. So key on two seconds, then off then back on for two seconds, then off and then try to start it.

Also, the next time this happens. Pull a plug wire off of the spark plug and insert something into the end of it and have someone try to start the car and have the metal object really close to a piece of metal on the engine and see if you are getting a good strong popping blue spark. Don't have your hands on any part of the metal! If there is no spark, then it is electrical. If you are getting good spark then you need to get a fuel pressure check on the fuel.
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Saturday, January 3rd, 2009 AT 9:27 PM

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