1990 Buick Regal very rough idle

1990 BUICK REGAL
147,179 MILES • 6 CYL • FWD • AUTOMATIC
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BRADLLU
  • MEMBER
  • 1 POST
I have a 1990 Buick regal 3.1. when i put in the diagnostic tester, it teels me i have a knock sensor error. the car runs fine for about 5 minuets and then something messes up and it has a very rough idle and will then stall. i replaced the egr valve and also the idle air control valve. i dont know what to do please help. THANKS
Jan 7, 2008 at 4:53 PM
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BLACKOP555
  • CAR REPAIR CONTRIBUTOR
  • 10,386 POSTS
change your knock sensor, very rarely will they fail, and when they do this may be the result. also clean out the throttle body.
Jan 7, 2008 at 7:12 PM
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