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1990 Buick Regal very rough idle

Tiny
BRADLLU
  • MEMBER
  • 1990 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 147,179 MILES
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
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Monday, January 7th, 2008 AT 4:53 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 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.
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Monday, January 7th, 2008 AT 7:12 PM

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