1992 Buick Regal Stumbling, Stalling and rough Idle

1992 BUICK REGAL
100,000 MILES • 6 CYL • FWD • AUTOMATIC
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IANPEARSON
  • MEMBER
  • 1 POST
My 92 regal stalls constantly and the revs jump and it wants to accelerate not much about 500 rpm.. have checked spark plugs & wires, air intake, put in fuel injector cleaner and cleaned the air idle valve and the throttle body.. battery is fairly new and alternator is fine, but as the buick struggles to maintain idle the lights interior and exterior dim slightly, PLEASE HELP
Dec 14, 2008 at 11:47 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi:
The lights dimming slightly is due to the low idle. Have you chcked for vacuum leaks? Also, have you had the computer scanned for trouble codes? Most nationally recognized parts stores will do it for free, so I recommend having it done.

To me, it sounds like a throttle position sensor problem, but I can't be sure without the scan.

Let me know what you find.

Joe
Dec 28, 2008 at 4:31 AM
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