Question about 1991 Oldsmobile Ninety Eight Regency

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1991 oldsmobile runs rough after awhile

When the car first starts it runs fine, then after coming to a stop after a few miles it will randomly begin to idle rough and make a rumbling noise when I accelrate. If I stop turn off the car and start it after a few minutes it won't do it, but will after driving a few miles. I checked the codes and came up with 22,41, and 42. Checked the cam circuit and tps circuit and came back normal. I heard it might be an ECM issue but am not sure if it is. How do I check it and replace it? I have never had to deal with an ECM.

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  • bp_snyder Feb 10, 2009

    Any easy methods to getting to the ECM? I will probably look at the junk yard as this car has a few miles on it, how do I make sure what ECM can I use? Any help would be great

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  • Master
  • 962 Answers

Code 22 refers to retarded advance camshaft Position Bank 2. the eaasiest way is to get a known good ECM and replace in place of the old one. if it runs good. replace it.

Posted on Feb 10, 2009

  • Daniel Arellano
    Daniel Arellano Feb 13, 2009

    try google. you may come up with used parts. like "u pull it' near your location. Make sure it is the same year and looks like the one you have in your car. the same number of pins at the plug , etc.

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