thanks for all the replies. RR i have a breather tube coming out of my passenger side valve cover that is connected to a tube coming out of the front of my qjet. the oil filler cap is definitely vented how can i tell if there is a pcv valve in the fittings between the vc and the carb? if i read your advice right if there is a valve here, i can put in a freezer plug on the outlet and forget about it.