Re: Compression test results-need opinions, please! - Saab 9000 Bulletin Board - Saabnet.com
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Re: Compression test results-need opinions, please!
Posted by Abusot (more from Abusot) on Wed, 18 Jan 2006 06:56:59
In Reply to: Compression test results-need opinions, please!, Victor, Wed, 18 Jan 2006 05:31:14
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Looks a little high, 180 psi/14.7 psi gives a compression ratio of 12:1 and change, what's it supposed to be? You are off by more than 10% high to low, however, but I wouldn't take any drastic measures if it were my car with that mileage. I would make sure the compression tester is properly calibrated and retest. Did you test with the engine fully warmed up?
If the idle is smooth, if you are not having any detonation (pinging)problems and the plugs look good, I wouldn't worry about it. Try doing an Italian tune up. Go and run it at 100 mph+ for 1/2 hour or so to clean out the carbon in the head.
posted by 65.10.11...
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