PVC Hose routes

[chobracobra]

I need to know where and what all the hoses related to the pvc system on a 5.0 motor are located. I thought i had it down, but now i just found a hose connected to the rear pvc system atached to a "L" elbow on the manifold that just sits there and sucks air. why is this here? i was going to install an oil separtor on the hose system but hesitated, becuase this hose is sucking in fresh air and not crank air. what gives? thanks

 

[DarkProphet]

If your talking about the PCV... it goes from the lower manifold to the valve which elbows to a T which connects to two parts of the intake manifold. One is the part closest to the drivers side and the other is underneath.

 

[vristang]

Pcv requires 2 hoses to work.

First hose will be on the Valve cover running to the TB. This supplies fresh air to the crankcase. You can cap this line off and run a filter element type cap instead. However, I have had to restrict the airflow into the crankcase, to further limit the amount of oil caught in the seperator. A double male vac splice fitting with a small id will work well.

Second runs between the pcv and the upper intake manifold. The 2 hoses described by DarkProphet confuse me. Maybe the 94 is different than the foxes? Although, I actually don't remember how the stock 302 in my 90 was routed. You will only need one line running from the pcv to the upper intake. This is the line you will put your seperator on.

Hope it helps

jason

 

[chobracobra]

thanks for the replies but here is what im looking at: There is the usual stand-alone hose that runs from the oil fill neck to the throttle body and there is a hose in the back from the lower manifold (pvc valve) this hose from the valve connects to a "T" elbow. one hose goes on the bottom of the upper intake (drivers side) and the other just chills there sucking in air. what is the hose sitting there? thanks in advance it is an 89

 

[vristang]

I can't think of anything that the unplugged hose would be used for. Unless you can find a hose that looks like it should hook up to it, I would cap it off. Whatever it is for, it is now causing a vac leak.

Even if it is a vac supply line for something, I would still cap it and route the vac supply straight from the upper intake or the vac tree. There will be oil in the pcv line which could contaminate whatever system this line is providing vac to.