Question about Buick Regal
The idle air control valve may be dirty with carbon and not working properly. You can try cleaning out the throttle body with two cans of throttle body cleaner, make sure you follow the instructions on the can and do not use carb cleaner. The carb cleaner is to corrosive to the gaskets used in throttle body's. Try to clean out the passage way to the idle air control valve at the throttle body. Once the throttle body has been cleaned and the instructions have been followed, you can reset the idle air control valve by turning the ignition keys to the on position for 30 seconds and then turn the keys to the off position then on for 10 seconds and then start. The engine may idle high then come down, wait for it to come down and idle for 1 min then go out for a test drive. that should fix the problem. If not try resetting the idle air control valve again. Good luck and keep me posted, most of the time it's a dirty or bad idle air control valve at the throttle body.
Posted on Sep 04, 2009
Did either of these work for you I'm having the exact same problem.
Posted on Mar 01, 2010
Transmission fluid is probably 1.5 qt low causing the lock up converter not to release check that first
Posted on Sep 04, 2009
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Posted on Jan 02, 2017
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Dec 17, 2015 | 1995 Buick Regal
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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