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Pontiac Repair/still idles too high


My 1991 Olds Cutlass with 3.1L v6 still idles too high. I did the learn thing you told me to do and I checked for leaks as you suggested and it still idles too high. It's so high, when I put it into gear the cv joint on the driver side is making a clunking noise now. I'll probably have that replaced after I get the idle under control. You said there can be other issues. Can you explain? Thanks so much.

did it idle lower for a while and then back to a fast idle again? of no change at all.? if it did work for a bit try this disconnect the battery and let it sit a 10 minutes and try again. if not then there is something either driving the idle high or the engine computer is at fault here. the problem is that you need a true engine scan tool to see the data the engine control module sees to looks for what is driving the idle high. and even if you had a scan tool you need to know what to look for. so it's kind of beyond the do it your self fix right now. what I would be looking for is the IAC (idle air control motor) is at for counts in park engine e ideling. and I would look at the TP sensor (throttle position) and the throttle angle % those at the tell tail things to look at for an increased idle on these engines. .

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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