Misfire at cruise, popping/afterfire at 3000RPM

AJ/FormS said

I don't understand this between business.
Nor is it possible to "back up the crank" with pressure in the chamber unless you have a really long bar, and then you cannot go very far until your bar hits something.
So you are looking at EIGHT different TDC-pressure tests, with each done at TDC-compression. There is no between 8 and 4 business; nor between 4 and 3; nor between anything.
To do a LD test, each piston in turn must be at TDC on it's specific compression stroke.
If your engine had the leakage you are reporting.......... it would not even start.

Click to expand...

I understand that the piston needs to be at TDC on the compression stroke, so when I saw how much leakage the gauge was showing, I thought maybe I wasn’t at TDC and I had a valve slightly open. So, I turned the balancer backwards a few degrees to see if the leak changed. And did the same forwards. Maybe at 30 psi it’s easier to turn the crank? I don’t know, but it turned by hand. It wasn’t easy, but it turned. Or what if that cylinder truly is leaking that much? It definitely wouldn’t build enough pressure to make it hard to turn. That’s just me spit balling.