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Old 08-30-2009, 03:09 PM   #2 (permalink)
pgfpro
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Quote:
Originally Posted by markweatherill View Post
I did a compression test on my car and got very high readings. (Book says 192PSI, my gauge showed around 220PSI)
Afterwards I realised I didn't hold the throttle open while doing it.
Now, wouldn't that have given me readings *lower* than expected?
With the throttle blade open your compression readings should go up a little.

As far as the higher comp. numbers I would be happy. Compression gauges tend to vary, so as long as the cylinders are reading close to each other your fine.
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