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Time for one of those small inspection camera's like Milwaukee and others make.
Slide it in the spark plug hole and have a look.
A lot easier than pulling the heads.
Get one of those easy to use rubber ended compression testers just press it into the cylinder and crank it over far easier than screwing the old style in hole by hole.
Good Luck with it.
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2010 2SS/RS A6 ZL1 Rims
60ft 2.03 13.08 at 107.82 (4/28)
2009 Pontiac G8 3.6L the DD
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