The CJ is a 1971. My Buick V-6 will not idle when warm. I have adjusted the idle screws from seated to many turns out with no change. I can hold near idle speed (800 to 1000 RPM) with the accelerator. It will idle at about 800 RPM when cold but once it is warm it dies when I let off the accelerator pedal. I removed the PCV valve, installed a breather cap and plugged the manifold port, I don't know if that would affect idle. I would appreciate any ideas.