Question about 1996 Pontiac Grand Am

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My 1999 pontiac grand am shuts down when it reaches 3 knot past the middle temp gage never fails .i change o2 censor ,fan relays and brake booster. it's a 2.4

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  • jmottavega1 Jul 18, 2009

    i got a new ecu matching the vin and it still shuts down . new spark plugs, new intake gasget and new heat sensor.

  • jmottavega1 Jul 18, 2009

    where are the coils located?

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  • Master
  • 2,187 Answers

The ECU have may have detected an error. A scanner would tell you the error code is to determine accurately the problem. If the gauge checks out OK, the car's computer may be faulty that it causes the shutdown early. If you know someone who has the same car and engine and try out the ECU on your car to check if it is not a ECU malfunction. If it is not the ECU it could be a blown head gasket or worn out. It could also be the ignition system, the sparks may not be firing when the temp increases on your engine. An ignition coil or distributor that is on its way to break down may nor work properly due to heat. You may want to have it tested either by observing the sparks or trying out another unit, a spare or a borrowed unit.

Posted on Jul 18, 2009

  • Nicolo Carlo Parazo Jul 18, 2009

    I would suggest to focus on the other electrical part such as the ignition coil, distributor and the sparks. Heat would affect the performance, especially the coils and the springs of the distributor. A test unit you can borrow would shorten the time of troubleshooting as well as save you from buying a unit and doing a trial and error.




  • Nicolo Carlo Parazo Jul 18, 2009

    its a white plastic housing normally bolted to the aluminum cover.

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Good Luck and Have A Great Evening. rejakwilson

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