[db_cooper]

Originally Posted by brizzity

I can't say that I've noticed any change in idle without the oil filler cap on. If there is, it's probably not enough to notice while back in the engine compartment. I'd have to check the tach I guess to see if there's anything subtle.

I usually run the oil somewhere between the middle of min and max and 3/4. Since i noticed the smoke, I've kept it in the middle. My wrench suggested trying to run it a little closer to min to see if there's a difference.

When you remove the oil cap, engine warm at idle..the engine should have a noticeable drop in rpm and struggle to idle. If not..you have a problem..air leak..very rich mixture..something.