93 2.3 Turbo low rpm hesitation/stumbling prior to warmup - Saab 9000 Bulletin Board - Saabnet.com
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93 2.3 Turbo low rpm hesitation/stumbling prior to warmup
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Posted by Jeff Brokaw [Email] (more from Jeff Brokaw) on Mon, 2 Apr 2001 14:52:40 Share Post by Email
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Just got the car, 170k miles, but in great shape and runs good, EXCEPT when the engine is cold, when it hesitates/stumbles going upwards from idle to 2k rpms or so. After warmup, problem seems to disappear. Idle seems to hunt hi/lo/hi/lo during this time too, though not always, and this may be a different problem and I'm not so concerned about it anyway.

This weekend I cleaned and inspected all the hoses, all look good, no obvious vacuum leaks found (yet). I removed the air intake hose from the throttle body and squirted some carb cleaner in the t.b., some gunk ran out, seems to have helped, but not totally fixed, so may need to go in there again and take it apart further, to allow fully opening the "butterfly valve" or whatever that thing is called all the way and clean that whole pathway even better. But if this was the source of the problem, wouldn't it remain after engine warmup?

Any other ideas? The big clue is it happens when cold, and stops upon warmup. Thanks in advance!

Jeff

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