Question about 2002 Pontiac Grand Prix

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I have a 2002 Pontiac grand prix 3.8 engine car starts stalls instantly but once in a while it will stay running for about 40 to 50 miles then shuts off while driving and wont start again

I have replaced the fuel pump and crank sensor and map sensor

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  • Robert Wood
    Robert Wood Apr 21, 2017

    Have you checked for spark and fuel pressure when it shuts down and will not instantly fire back up ?

  • david wikstrom
    david wikstrom Apr 21, 2017

    yes I have 50 psi on fuel pressure and it will fire up but then shuts down but it will fire every time I turn the key

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  • Pontiac Master
  • 3,913 Answers

Possible ignition module heat failure

Posted on Apr 21, 2017

Testimonial: "so I think it's a fuel issue when I prime it my gauge jumps to 58-60 psi but then starts dropping in about twenty minute it's down below 30 psi and I can't find any leaks anywhere"

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 14036 Answers

SOURCE: 2002 Pontiag Grand Prix GT 3.8 Runing rough and stalling at stops

sound like vacuum leak or fuel pump problems.scan it to see if egr valve sticking open.

Posted on May 14, 2009

polarcycle
  • 1392 Answers

SOURCE: starts and runs 3-5 seconds and shuts down

Sounds like your security system is shutting the car down. You should be able to leave the key on for 15 minutes and it will reset itself. Make sure you are using factory keys, and they are in good condition.

Posted on May 28, 2009

  • 1 Answer

SOURCE: 2002 pontiac grand prix gtp running really rough and puttin

get your catalytic converter checked, i have a 2002 gt model and GM just replaced the old with a new one free of charge. They have been having problems with them clogging up so they extended the warranty to 190000kms or 10 years. had the same issues as you and when it was replaced all was good, even sounded better. hope this helps and I hope you get the same deal as I did. it is not a recall so you have to bring it up to them. Good luck.

Posted on Jun 05, 2009

  • 176 Answers

SOURCE: car shuts off while driving wont start up

You need to replace your crankshaft position sensor located by the harmonic balacer. These sensors heat up and cut off the engine until the sensor cools down. This happens with age and it is not specific to GM.

Posted on Jun 15, 2009

  • 21 Answers

SOURCE: 97' Pontiac Gran Prix Won't Stay running

Known GTP problem.

You most likely have a bad fuel pump resistor, which controls 2 speeds of the fuel pump.

To check to see if this is the problem, there is a trick you can do and its very easy to do. Go to the attached link, and bend the tab my finger is pointing at and then plug it back in. If your car starts and runs fine, well we just solved the problem.

Link ->> http://www.boredandstupid.com/relay.jpg

Posted on Jan 04, 2010

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