Need Help... wierd idle issue... kinda long... - Saab 900 Bulletin Board - Saabnet.com
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Need Help... wierd idle issue... kinda long...
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Posted by LarsW900T [Email] (more from LarsW900T) on Sun, 28 Aug 2005 11:02:59 Share Post by Email
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First off it's a 1989 C900Turbo, most recent modification is a Swedish Dynamics high flow intake filter along with this mod I also removed the screens for the AMM two weeks ago. That being said here is the problem:

started yesterday:
1st, Shift light indicator is constantly flashing once per second.
2nd, A quick blip of the throttle and the engine bogs down, gradual pressure to the throttle and it is fine.
3rd, after driving for five minutes the idle is hunting between 900 and 1200 rpm. with a sort of rotten egg smell out of the tailpipe, (I know usual cat. converter causes this) cat is only 2 years old.

Other than the above stated Mod others include, slightly adjusted APC box, and 3 bar FPR, Silicone vacuum lines... a few other mods but not engine related. I used to have a ported and polished head but not any more. awaiting a 2.3 liter port and polish head and a 2.1 liter intake manifold.

Any help would be great. I plan on swapping the AMM back with the one with the screens to see if that makes a difference. By the way, I did check all vacuum lines and intake pipe seals... all are fine and tight.

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