Compression questions - Saab 900 Bulletin Board - Saabnet.com
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Compression questions
Posted by Jan Markham (more from Jan Markham) on Sun, 5 Oct 2008 19:30:54
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82 turbo (non-APC) 900, 5 speed, 106K, stored outside for many years, current owner for 2 years and yes, I have done everything possible per Bentley manual to check and adjust for proper tuning.
Symptoms:
-long crank times, 2 - 3 times at 5 sec each
-fuel effieciency is 15 mpg city (1 to 2 miles each trip) highway mileage unknown
-dry compression readings with warm engine, throttle valve blocked open, fuel relay pulled are in the 85 to 90 psi range ( have not yet checked the wet test)
Enough of the history here. What confuses me here is that this engine runs so smooth once its warmed up. No smoke at all. No loss of oil in 3K oil changes. How could the compression readings be that low and not show any significant drivability problems?
posted by 68.118.151...
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