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I'm noticing that my PCV valve is going nuts. When I leave it alone my engine run at a higher rpm but once I put my finger on the end of the pcv valve it runs lower...what gives???
The PCV valve is sucking air out of the crankcase , which is there by the vent on the other valve cover . Of course its going to run different , your richening it by blocking the extra air with your finger .
Solution ( sorry if I sound dickish BTW ) , don't put your finger on it , its working