2nd Generation Specific 1986-1992 Discussion

Compression Numbers

Old 02-29-2004, 05:19 PM
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Did a compression check on my car with a standard autozone checker. S4 Turbo with 169,000 on the OD. Both Trailing plugs were removed. And tested from the trailing.



Front rotor:



95 psi hot Throttle wide open

85psi hot Throttle closed



Rear rotor:



85 psi hot Throttle wide open

75 psi hot Throttle closed



As I understand it, mazda specs indicate that a variance between rotors of no more than 15psi is ok. What worries me is the 75psi closed



Any opinions?
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Old 02-29-2004, 08:14 PM
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Mazda says to crank with the throttle open. You're fine.
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Old 03-01-2004, 08:35 PM
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Boy, this looks familiar.





-Ted
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