Bouncing Idle question, and compression test numbers.. - Saab 9000 Bulletin Board - Saabnet.com
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Bouncing Idle question, and compression test numbers..
Posted by Jesse Chamberlain [Email] (more from Jesse Chamberlain) on Thu, 20 Apr 2006 04:53:56
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I have a 93 9000 CS auto and I just did the head gasket, and replaced a valve on the engine. I just did a compression test on it last night, and I got 180, 175, 175, 185. So it looks like the head gasket is sealing well! This is on a bottom end that has 155K miles on it.
Now, the bouncing Idle question. On the car, I noticed when I first start the car when cold, the idle seems to fluctuate something like +- 100 RPMs. It's not enough to cause the engine to seem like its going to stall, but enough to notice. What would cause something like this? I was thinking a vacume leak or something similar, but does this sort of thing happen with a dirty idle control valve? Is this normal behavior? I dont remember seeing this happening before all of my problems with my engine.
Thanks for the help!
Jesse Chamberlain
posted by 205.246.2...
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