first off, list your mods...
stock mafs? safc? stock boost/injectors?
i ask about them because the settings can be picky as fuck, and getting a z32 maf to idle right can be a pain in the ass

running rich could be a bad tune (if any), a boost leak, leaking injectors or a mess of other things... if you're running a stock ecu and mafs it's likely you need to have do a fuel injectors test to see if they're leaking gas


and about the PCV T on the vavle over
if its open,
you're getting road grime, dust and dirt in your oil
put a discount auto cheapass 5 dollar air filter on it and do an oil change