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Erratic Idle
Posted by Chris DeHaven - http://saabnet.com/tsn/forms/e.php (more from Chris DeHaven - http://saabnet.com/tsn/forms/e.php) on Mon, 28 Apr 2003 16:57:32
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00

This is a '88 900 T /manuel with 194K. Most of the time it runs
GREAT..plenty of boost, smooth idle at about 900 etc. On ocasion the idle
takes off..usually starts at speed..the rpm's will start jumping between
3000 and about 3300..then if you accellerate, boost is there, but it kinda
chokes and lunges. Upon stopping idle hangs at 2000 and the bounces between
1800 and 2500.In this senario nothing helps except turning it off...I just
pulled in the driveway..tried slugging the AIC..nothing.
This episode was preceeded by 'spirited' driving with perfect performance
and then a stop for gas. On restart, the idle was OK, but as soon as I got
to speed on the interstate it started. Sometimes erractic idle follows a
warm restart..sometimes its a cold start..sometime not at all!
Have tried 3 differt AIC (used) and nothing. Did find the green wire to the
TPS broken or cut..fixed it..nothing.
Any and all opinions and help greatly appreciated, as this is a trusted
daily driver.

Thanks, Chris aka bamaSAAB
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