Re: Erratic warm idle is driving me crazy - Saab 900 Bulletin Board - Saabnet.com
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Re: Erratic warm idle is driving me crazy
Posted by Scott Shure [Email] (more from Scott Shure) on Tue, 8 Dec 2009 12:24:05
In Reply to: Erratic warm idle is driving me crazy, Jims900S, Mon, 7 Dec 2009 16:47:34
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Jim,
That is the vacuum pump for the cruise and it should have an open nipple.
While I would not eliminate vacuum leaks as a contributing cause, I would look at the temp sensor for the fuel injection. It mounts near the bottom of the intake manifold between cylinders 2 & 3. Bentley will have resistance values for various temps. Values dont have to match exact but wild idle fluctuation on a later car make me think of it.
Also try going through the troubleshooting in the fuel injection chapter. Doesn't take long. And keep looking for vacuum leaks even in a non turbo.
Scott in Maryland
posted by 74.201....
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