[HWYSTR455]

Originally Posted by grivera

I think Mike R (HWYSTR455) tried a different coil during a different testing session- Mike ? ....

I did have a known good coil with me when I went over, but didn't try it. When I made initial adjustments, and bypassed the ignition 12v wire, I felt the knock had somewhat subsided, but admit the idle was at 1000 rpm, and was more unnoticeable.

In the latest vids, you can see the vacuum gauge swinging while it's missing. I believe that is a key factor, the miss coincides with the knock.

I still don't understand why someone would bother checking total timing and not initial, and the one time it cranked it cranked slow. I still say in that vid the initial timing is too high, but don't believe that's what's making it knock. There is some type of ignition or valve/valvetrain issue to cause a consistent miss like that. Some type of abnormal combustion, which could certainly cause an audible knock like what's being experienced.

EDIT: I'm glad to see a number of tests were done that eliminated several questions/possible causes, that narrows it down more.

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