Question about 1997 Pontiac Grand Prix

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3.8 v6 1997 pontiac grand prix. The car when cold will start and run fine, then when temp guage moves off the 100 it will idle rough then die out. When attempting to restart it fires right up and dies out right away. I just spent $400 plus to rebuild the motor. Only thing original in motor is the sensors and pully system. I'm thinking sensor. Anyone have any idea?

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  • Jeremy W.
    Jeremy W. Feb 09, 2012

    can you keep it running by keeping your foot on the gas?

  • racingfurpen Feb 09, 2012

    ok. i had a complete donor 3.8 motor, and when i traded the mass air flow sensors, it runs fine. i just have a real bad rocker knock. does anyone know what they need to be set at



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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: 1991 pontiac grand prix se won't start

Probably need the computer reset. All these cars now days are set up for the dealer to screw you. The fix yourself is about history

Posted on Mar 16, 2009

  • 2007 Answers

SOURCE: car idles rough and stalls

Have you ever changed the fuel filter? If it's not that, and it's not a vacuum leak, it is probably your idle air control valve.

Posted on May 08, 2009

  • 1 Answer

SOURCE: 97 grand prix gtp starts then immediatly dies

If you have a GTP these engines use a hi output fuel pump. they use a fuel pump resistor located under the battery tray (look up from under the car) This resistor lowers the voltage to the fuel fump when not in boost mode. because of its locatoin it is prone to corrosion. if you bypass the wires and the engine starts and stays running replace the resistor

Posted on May 16, 2009

  • 1341 Answers


100k miles means a knackered engine.You will start having problems with it when it reaches this kind of mileage.

Posted on Jul 09, 2009

  • 26 Answers

SOURCE: rough idle

had the same issue with mine, a full tuneup and a really good cleaning for the throttlebody cleared mine up.

Posted on Sep 22, 2009

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