High idle


Asked by May 06, 2016 at 04:03 PM about the 1992 Buick Skylark Base Sedan

Question type: Maintenance & Repair

My car was having problems with high idle
and the speedometer would only work once
in a while. I just replaced the ECM and
everything is working again all except the
high idle. When I start the car it runs at 3000
rpm and when I drive it around it ildes at
2100 rpm. I have no vacuum leakes
anywhere. Please help.

4 Answers


check for codes. google, "how to read gm obd1 codes" could be throttle position sensor or idle air control valve.


It's got a new idle air control valve and the service engine light is not on. Could a blown donut gasket cause the high idle?


Not sure what you mean by "donut gasket", but check for codes whether the light is on or not. Try cleaning the throttle body.


It also occurs to me that since you replaced the ecm, you may have to do an "idle relearn procedure" google it for your gm car.

Your Answer

Add photo

Related Questions


Looking for a Used Skylark in your area?

CarGurus has 118 nationwide Skylark listings and the tools to find you a great deal.


Search Buick Skylark Questions

Buick Skylark Experts

#1 FordNut
Reputation 210
#2 GopherTEFT
Reputation 160
#3 Js08016
Reputation 140
View All

Related Models For Sale

Used Buick Riviera"
151 listings starting at $1,295
Used Buick Regal"
182 Great Deals out of 10,509 listings starting at $1,995
Used Chevrolet Camaro"
813 Great Deals out of 39,041 listings starting at $2,650
Used Porsche 911"
153 Great Deals out of 4,412 listings starting at $12,995
Used Buick Century"
1,302 listings starting at $3,295
Used Chevrolet Corvette"
425 Great Deals out of 20,186 listings starting at $3,688
Used Pontiac Firebird"
11 Great Deals out of 893 listings starting at $2,995
Used Chevrolet Caprice"
199 listings starting at $10,900
Used Ford Mustang"
724 Great Deals out of 41,223 listings starting at $900