RE: 96 silverado high idle speed
pcv is new too, and sucking air like it should. when i take the cap off the oil fill tube, the engine almost dies. can the pcv suck sooo much air from the crankcase that it would create that kind of vaccuum from the oil fill tube?
all the carbuerator cars and trucks i have owned don't have anywhere near that kind of vacuum in the crankcase, even with the pcv system.