Question about 1991 Pontiac Grand Am

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Will not start when engine warm

My daughter has a 91 grand am, car starts up fine when engine cold, but once car gets warm it will either stall or if parked will not start again till cold. Pretty sure it is electrical car seems to lose spark when warm. Could it be ECM and how do you replace that?

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  • kng913 Oct 10, 2008

    I also have a 1991 grand am with a 2.5 engine starts fine when engine is cold but stalls when hot or when turned off while hot will not re-start till engine is cooled off. I've replaced the ignition control module this did not work. Please Help!

  • Anonymous May 04, 2009

    soon as my 1991 grand am warms up u have wait tell it cools off

  • Anonymous Apr 01, 2014

    "when car sits for a while or it is cold when starts, the valves make a loud tapping noise, it goes away after car gets warm. ( not sure if it is the valves or not, that's just what it sounds like

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Sounds more like your ignition module is getting hot and not working. I'd go there first before replacing the ECM. You can remove the ignition module and most NAPA stores have the ability to test them for you. Make sure they test it at least 5 times. This way it'll simulate starting and stopping.

Posted on Jul 23, 2008

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