I need help with an engine problem

[vector1]

do a leak down test, not compression test. i would check the cylinder head torque, which means loosening and retightening each one in sequence, still not fixed, put oil in the cylinder and see if the numbers come jump. if that doesn't fix it....

i would suspect carbon on the valve face surfaces keeping the valves from closing, which would cause the pushrod to seem to be too short.....

fix the rich condition.