Question about 1990 Oldsmobile Cutlass Supreme Conv

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My 90 olds cutlass supreme 3.1 automatic starts and runs until it warms up.reving the motor and letting it return to idle a few times,the idle gets ruff then dies and will not start again until it cools down. I've cleaned the egr valve,repaced the idle air control valve.I have an obd1/11 reader but can't get it to show anything is wrong even after disconnecting the battery.Could the be a crankshaft sensor or an o2 sensor?

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  • Anonymous Mar 25, 2014

    need to replace idle air control valve don't know where is located.

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You most likely have a injector breaking down which is causing the quad driver in the computer which control the injector pulse to shut down .When a injector resistance is to low this will happen the correct resistance in ohms is 12.4 per each injector .This was a very common problem with 88 to 97 gm cars.have this zcheck at a reliable shop :)

Posted on Sep 29, 2009

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