Please help me diagnose this 273

RustyRatRod said

Some of yall aren't paying attention. One of his cylinders is at 65 PSI. Not too many things can cause that.

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Story.... Bought an old F350 40 years ago. Had 2 dead cylinders.... broken rings in one.... the other dead cylinder had hole in the exhaust valve that you could stick a pencil through LOL. Idled fine at 700 RPM, just with the classic hillbilly logging truck 'putt-putt-putt'. With 65 psi compression, it would have idled smooth as silk. (Well, almost!)

So sure, this 273 has low compression in 2 cylinders....but that is not what is making it die at idle. I've had at least 3-4 engines with a cylinder that low and drove them and they idled fine, even 4 bangers.