Having problems with your 1991 Oldsmobile Cutlass Supreme ?

91 olds supreme 79,000 miles, the problem is the idle. the wife will go out and start the car and it will not idle it dies, was told that the idle needs relearned.now if I do it on the third I"ll hold the gas to 2000 rpm and gently let of f, it fine for a coupla of days. She can not do this for some reason. there is no pattern, has had a tune-up at dealer when we bought it. any ideas will be helpfull, cause mamma's not happy no one is happy

Posted / edited by AnonymousUser on : 20-11-2017

Answers :

Hi,\015\012
\015\012You need to get the thermistor checked, this is what controls the cold idle up, when it is cold the computers is told to turn the idle up and give the engine more gas.\015\012If this sensor is faulty you can and will have cold start problems,its ok when its hot but when its cold....it will play up.\015\012Let me know if you need more information.\015\012
\015\012Thanks\015\012
\015\012Jason
\015\012Your car is equipped with a computer controlled engine \015\012management system. Try to visit any independent auto service \015\012and could scan your computer for fault or error codes. The information should pinpoint the malfunctioning \015\012components.

If a major tune-up has not been \015\012done recently, this could be the cause of your problem. Replace the spark plugs, plug wires, fuel and air \015\012filters, etc. Also, replace the oxygen sensor. In addition, service the fuel injection system. Clean the carbon deposits from the throttle bore and \015\012idle passages.


Also, you should check to see if the throttle cable and throttle body are \015\012adjusted properly, check for vacuum leaks and verify the idle valve is \015\012working properly.

Keep us updated.
Repair Help & Product Troubleshooting for 1991 Oldsmobile Cutlass Supreme

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