Dougmcmullen
LVC Member
01 lincoln ls v8 there is a plastic line running from the passenger side front manifold cover back to the air flow valve with a 45 degree fitting on it . Need help to figure out what this is
Rock auto has them in stockmine was dry rotten im been wating for months to get on backorder so I gave up and epoxied it and runs fine
Found it tasca parts has them thanks for the helpIt's probably XW4Z-6758-AA, just described as "Hose - Connecting." It is one of the two PCV (Positive Crankcase Ventilation) tubes. Do note that the LS V8 does not have a PCV valve. Also note that the knock sensors are under the intake manifold and fairly well hidden.