1991 Oldsmobile Cutlass high idle

JAMESSPEEG

MEMBER
1991 OLDSMOBILE CUTLASS
4 CYL
FWD
AUTOMATIC
58,000 MILES

The car idles at 3,000 rpms all the time. 2.50 liter engine. Service engine soon light is on.

Saturday, April 26th, 2008 AT 8:02 PM

4 Replies

MERLIN2021

MECHANIC
17,250 POSTS

First thing you need to do is have the codes read, Autozone does it free, Post the results with the code number(s). Even if the service engine light is not on, there should be freeze frame data stored.
If it won't make it to Autozone, buy a cheap scanner, they can be had for 30-40 dollars, a good investment, since they cover all cars sold in the USA from 96 on.

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Saturday, April 26th, 2008 AT 8:10 PM

JAMESSPEEG

MEMBER
2 POSTS

Autozone can only read codes from 1996 & newer. Is there any one thing that is common to cause a problem like this?

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+1

Saturday, April 26th, 2008 AT 8:14 PM

ROSSG

MEMBER
4 POSTS

You can use a paper clip to jump the diagnostic conector. Get a chilton manual or the like and it will tell you how to read the flashing lights. they will blink out your code. top of my head i would say you have a vacum leak you can buy a code key also look on ebay

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Tuesday, August 5th, 2008 AT 7:36 AM

MERLIN2021

MECHANIC
17,250 POSTS

Cross these two terminals as shown, then turn the key on. Count the flashes, a 22 will flash as 2 flashes then a short pause, then 2 flashes, if more than one code is stored, the pause will be longer. The codes will display three times and end with 12. Write them down and post here. This connector is right under the middle of the dash...