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Poor Idling When Warm
Posted by Derek Shaffer - http://saabnet.com/tsn/forms/e.php (more from Derek Shaffer - http://saabnet.com/tsn/forms/e.php) on Mon, 1 Dec 2003 23:40:00
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00

My '91 9000T has had an increasingly bad misfiring problem when the engine is
warm. It generally runs smoothly when cold, but the warmer the engine gets,
the choppier the idle gets, until in worst cases at full temperature, it
seems to be chugging along on less than 4 cylinders. I've been reading that
failing O2 sensors can cause this, and that an easy way to check one would be
to disconnect it while the engine is running and see if there is any
difference. Can anyone tell me where the sensor(s) are located on my car?

Thanks,
-Derek Shaffer
'91 9000T 5sp 168K
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