Strange Idle Problem - Saab 900 Bulletin Board - Saabnet.com
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Strange Idle Problem
Posted by Nickshu (more from Nickshu) on Thu, 16 May 2002 20:28:29
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Hi Everyone,
My 1993 900S (98K)2.1L has developed a strange intermittent idle problem that I could use some help diagnosing.
Every 2nd or 3rd time when I start the car cold, it catches and then stalls immediately. After a few tries I can get it to idle at about 250RPM's. After shutting off and restarting a couple more times, it starts perfectly at idle speed of 900-1000RPM's.
After driving a bit and at normal operating temp, the idle goes to about 500RPM's and it runs a bit rough. Simply shutting the car off and restarting makes it idle normally, until awhile later when it intermittently will do this again.
Car has up-to-date service, good NGK plugs, cap, rotor, filters, and otherwise is in perfect condition.
Any experiences and/or ideas on the source of this problem would be great!
I was thinking it might be something like the ignition module? Not sure.
Thanks in advance for your help!
Nick
95 900S
93 900S
..Saabs since '86
posted by 24.160.25...
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