cold weather idle vibration - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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cold weather idle vibration
Posted by MJP (more from MJP) on Tue, 26 Dec 2000 13:46:30
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When I first start the car (99' 9-3SE - auto) on these cold Ohio mornings the idle is at such a "frequency" as to make the interior rattle around a bit. The car doesn't idle "roughly" but it seems as though the frequency (or idle speed) is off. Interestingly, inlike every other car I have owned, my Saab does not keep RPM's high when starting in cold weather. It settles in at ~900 RPM's right after start (cold, hot, etc.)
In addition, when I shift out of park on these cold mornings, the idle "hesitates" and has to catch itself (after shaking the whole car). I'm just going to guess that I need to replace plugs, (I recently ran two bottles of Techron through it without effect). Doesn't matter if I use 87 or 93 octane.
Any other thoughts? Increase idle speed?
TIA
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