to hear it isnt simple.

but your method of doing the compression test may be an issue. there is not any reason i can see for it to come out high then low on the same cylinder except tester fault. or testing.

is your compression testor a screw in type?

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.