Date: Sun, 03 Feb 2002 10:01:51 +0000 From: danny <dannynopsamia-esprezzo.com> Subject: Re: 9000 intermittent rough idle/stalling
Ramsey Frist wrote: > Its likely that the problem is with the "adaptive idle control valve" > which maintains the proper idle by regulating air through the bypass > around the throttle. On two of my Saabs these got sticky somewhere around > 100,000 miles. If you are lucky a good cleaning with choke cleaner and Q > tips will fix it. If it still acts screwy after cleaning it means the > electrical commontator on the servo motor is burned in places and you > might as well replace it. > > I was also once told by a Saab trained technician that the only symptom of > the oxygen sensor going bad is an irregulor idle but I don't think that > this would cause it to be as drastic as you describe. > Thanks Ramsey. I agree with you re: oxygen sensor. Does the fact that the car runs fine for weeks, followed by a period of this behaviour then back to normal running have any bearing on whether it's the idle control valve? It doesn't matter much, as it probably needs a clean anyway so I'll attend to it. It almost seems like a broken wire or fuel starvation - I can sit there stationary at idle, everything fine, then all of a sudden it's like someone has switched the ignition off, or it's run out of fuel - the idling drops so suddenly - that's why I have to keep the throttle slighty open when it's in this mood, so that it doesn't stall. -- Regards, Danny http://www.gaggia-espresso.com (a purely hobby site) http://www.dannyscoffee.com (UK advert for my mobile espresso service) swap Z for above characters in email address to reply
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