Question about 1991 Buick Century

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Buick 94 century custome reving and irratic stumbling etc.

My car runs at a very high idle speed, and sometimes it comes back to normal when the service engine light comes on.
Gears wont change at a high rev. sometimes they do.
after heating up it simply dies while idling at a traffice light.
some help please

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I've had this problem. It's most likely a large fail in one, or series of small problems in all, of these:
IAC (Idle Air Control) Valve - Will cause erratic idle
ERG (Exhaust Gas Return) Valve - Will cause irregular acceleration
*TPS (Throttle Position Sensor) - Most likely the culprit. It was my major problem. It'll cause exactly what you described.

And if you did not know this, your car is equipped with an OBD (On Board Diagnostic) system. Next time the service light comes on, whether the car is running or not, push [OFF] and [TEMP UP] on your climate control and hold for about 3 seconds. All the dash lights will come on and any error codes will be displayed where your odometer is.
Other controls are:
[FAN UP] -OK
[FAN DOWN] - Next
[OFF] - Rescan
[BI LEV] - Quit

Posted on Feb 13, 2009

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My buick is idling high what should i do


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If your car is running normally, no chugging or rough running, it isn't a serious issue. But you should have it looked at to determine why it set.
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Thank you for using FixYa.
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