Hi Johnathon,

Thanks for the reply. When I said that the compression "seems low", that may have been an incorrect statement. When I tested the compression, I the max value it went up to was the same as the other cylinders, however, my wife said (she was my assistant) that the needle on the guage was bouncing up and down quite a bit.... a lot more than with the other cylinders.....when I attempted to remove it, the hose spun around and the bolt at the end did not....I ended up having to remove the guage using a long pair of needle nose pliers. I then recrimped the hose after that test, which was the first test. I am thinking that I need to retest that one as, possibly, the guage was giving a bad reading because of the loose hose.

The spark plug did look bad though, it had a bunch of black deposits on it while the others looked clean.

Assuming that the valve is not bent (I will verify this at my next opportunity) what would a spark plug look like for a cylinder with a bad cam lobe or rocker ?

Thanks,

Brian