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Re: Varying Idle
Posted by Christian [Email] (more from Christian) on Thu, 31 Jul 2014 13:05:50
In Reply to: Re: Varying Idle, Simon S, Thu, 31 Jul 2014 10:31:40
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There is a post in another saab site on hunting idle that caught my attention:
It's interesting when he talks about delayed communication between the ECM and the AIC valve. That articulates the problem perfectly. Delayed responses. The AIC suddenly realizes the idle is to low and then allows in wayyy to much air, then the idle is dropped to compensate, but dropped too low, and the process is repeated again every second for about 20 seconds.
But then why would this process fix itself after a few seconds? That I do not get. Nonetheless I'm going to take a closer look at the AIC valve this weekend.
Further down the thread, someone mentioned spraying WD40 on the connectors on the AIC valve - that solved his problem.
Thanks for your quick replies.
.
posted by 12.20.4...
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