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Old 05-03-2021, 09:05 AM   #3
SteveMD
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Join Date: Feb 2004
Location: Stop paddling, I hear banjos.
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Quote:
Originally Posted by esmth View Post
i recently did a compression test in my 240 and opening the throttle vs leaving it closed made zero difference in the reading
Thanks. I'm starting to see it now: the cylinder being tested will pull in air from the intake manifold into which air can enter from the other cylinders as their valves open and close.
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