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All you can really adjust is idle mixture and idle speed. Screw the idle mixture in until it tries to die, then back out and leave it at the spot where the engine is the highest RPM. On idle speed...

That would make the intermittent nature make more sense.

That's damn good oil pressure.

You can get any type of mechanical gauge and use a hose. Grease gun hose is the right size and screw it into the block where the oil sender is.

I just have never seen a serious knock that didn't keep knocking and get worse. Maybe something is slow getting oil to it.

Well, that's a heck of a knock, but sound good when it isn't knocking. In my experience, a rod knock doesn't go away. You might get a wooden dowel a couple of feet long and place it in different...