Question about 1999 Pontiac Montana

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Engine problem starting properly

Please help!

I discovered that my engine was not firing properly, I service the engine and changed the plugs and nozzles (on recommendation of my technician) the problem seems to get worse.

right now starting the engine is difficult, when started it seems to be missing fire and will go off after about 3 minutes.

My technician suspect the brain box after much trouble shooting - but this was not issue before the servicing and change outs.

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  • 4 more comments 
  • oluwolesegun Nov 03, 2008

    Thanks for your prompt response.



    What is PCM or PCM ground?



    There is no dealer tech here in Nigeria, he is outside shop.

  • oluwolesegun Nov 03, 2008

    I have done that please

  • oluwolesegun Nov 03, 2008

    I have check the plugs are ok.



    I have had the distribution coil examined, looks ok too.

  • oluwolesegun Nov 05, 2008

    Thanks,



    No I did not change anything else, I did not remove the timing belt, it was only the plugs and the injector nozzles that I changed.



    Could the PCM be same as the brain box, I yes I will have my tech check the ground as you suggested.



  • don5ro Nov 20, 2008

    Engine runs Sluggesh

  • yadayada
    yadayada May 11, 2010

    I think that the PCM or the PCM ground may be the problem was a dealer tech or just a outside shop?

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  • 11 Answers

Remove all plugs adjust the gap to 0.2 cm to 0.27 cm remember not to break them while adjusting the gap. or else check the spark distributor and contact me.

Posted on Nov 03, 2008

  • aqui1991
    aqui1991 Nov 03, 2008

    Powertrain Control Module.

  • aqui1991
    aqui1991 Nov 05, 2008

    i forgot 2 ask you "did you change anything else"
    if so what , or did u remove the timing belt?

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