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Have the tps (throttle position sensor) sensor checked. It could be bad or maybe it just needs to be repositioned. my 92 Buick century idles erracticly and I simply adjust the tps sensor and it idles down but is erractic again once i hit huge bumps in the road. the fast idle solonoid is dirty. Takeit off of the throtle body and clean it. It's located on the back of the throttle body. 2 Phillips screws. Clean the carbon off with throttle body cleaner. And the first answerer needs to fix his or her grammar. Go back and listen in English class. I'd be ashamed.
Anjother possible answer:
Check four prossible lo koolant condishin, or faulty or diskonkted ECT sensor. I is even more ashamded. Vakyoum leaksis are anothear pissibltee.
What else can I help you with?
Where is the fuse box located in a 1991 Buick century?
The fuse box is located in the glove box on 1991 Buick Century
Will a header panel from a 1991 Buick Century fit on a 1990 Buick Century?
yea it should
My 1991 Buick Century won't move or hold transmission fluid?
My 1991 Buick Century won't move or hold transmission fluid
Does the 1991 Buick century have sealed wheel bearings?
Yes, on Buick Century 1991 you need to replace the whole hub, it is much easier than replacing individual bearings.
What is the oil capacity for a 1991 buick century 3.3?
The oil capacity for a 1991 Buick Century 3.3 is approximately 5 quarts. The recommended oil type is 10 W 30.
What type of transmission fluid is needed for a 1991 buick century custom?
Dextron 3
How many gallon gas tank on a 1991 century 2.5?
My Chilton's Auto Repair Manual shows : For a 1991 Buick Century : ( 15.7 U.S. gallon gas tank )
Where is the fuse located for the fuel injectors on a 1991 buick century 3.3?
behind right headlight
What is the firing order for a 1991 Buick Century?
1-6-5-4-3-2
Where is the flasher 'fuse' for the 1991 Buick Century?
above the gas pedal, mounted to the steering wheel.
How do you detect a leak in the radiator of a 1991 Buick Century?
Pressure test system and watch for leak
Does a 1991 buick century 3300 V6 have a cam shaft?
yes it does as do almost all reciprocating engines
