I have been idling about 300-400 rpms and havent been able to adjust it by the screw. Thing is, the engine is a 95 B18b but has a newer B18/B20 valve cover on it with a PCV valve hole. I have put a PCV valve in there but the other end of the hose is just floating because i noticed on the stock 95 valve covers there is no hole for a PCV valve. Is this the idle problem and how would i plug that hole??