z34duck Posted May 11, 2009 Report Share Posted May 11, 2009 My 92 grandprix with a3.1 runs normal cool but once warmed up has no power acts and sounds like timing way off if you shut the car off and wait like 30 sec sometimes it will run right for a few miles . no check engine light, its not a skipping and it will run like this for few miles and take right off like it was never running bad . I was thinking control modual on its way out any ideas Quote Link to comment Share on other sites More sharing options...
Brian P Posted May 11, 2009 Report Share Posted May 11, 2009 could be the ign control module, maybe even the O2 sensor... lots of possibilities in all honesty (MAP sensor too) Quote Link to comment Share on other sites More sharing options...
jman093 Posted May 12, 2009 Report Share Posted May 12, 2009 My guess would be the ignition module. You can take it off and O'reilly or Autozone can test it. My other guess be a bad crank sensor. Quote Link to comment Share on other sites More sharing options...
z34duck Posted May 13, 2009 Author Report Share Posted May 13, 2009 thank you for the help guys . I changed the module with a spare one i had and it runs perfect now :cool:the old one was coverd in oil from aleaking valve cover gasket that i also fixed today im sure all oil that did not help it any. Quote Link to comment Share on other sites More sharing options...
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