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Old 08-30-2009, 03:09 PM   #2 (permalink)
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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.
Pressure Gradient Force
The Positive Side of the Number Line

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