I'm not sure what the big nipple is right in front of the oil fill on my 90 turbo?

My car is highly modified
-rebuild/streetport
-microtech lt8s
-larger injectors
-aeromotive/walbro fuel
-No power steering
-No A/C
-3'' front mount/godspeed intercooler
-3'' turbo back exhaust/xr1 res
-BNR stg3 hybrid
-Fluidyne RAD/e-fan
-Prolite fly/ss clutch
ect...

 

if you ar talking about the big (10mm?) nipple on the filler neck, then it is a vent for the PCV system. ( i cant see pics at work) I am assuming that the rats nest has been removed from your car as well. that nipple as well as the one pointing to the firewall on the intermediate housing just at the base of the filler need to be vented, either a catch can or open vented. if you leave them open, they will mist (possibly even drench) your bay with oil. If you cap them, problems will ensue. hope it helps

 

allright cool cool, so how do you (open vent) thie nipple to the fire wall, or is it both the nipples you listed?

-Dustin

 

picture...