i just did the isr mod to my 88 toyota truck with the 3.0 v6. i ran all the vent lines in to the intake tube and i poped the hood today to check the oil and had oil comming outa my air filter well i found out the oil is comming out of the hose that comes off the vavle cover what is this hose for and why is it spitting oil out of it ?

 

They do that. It's just a breather line. However you shouldn't have oil pouring out onto the filter but a little bit here and there is normal.

 

Check your pcv valve and make sure its not plugged.

 

i just went and blew in the hose that comes off the drivers side valve cover and it took the air no problem so its my under standing that if you can blow through it the pcv is not the problem so what could be making so much oil come out of this hose and i already checked my oil level and its fine any ideas any one ?

 

The hose on the driver's side is the PCV inlet(or ventilation hose to use Toyota's terms)that allows fresh air to enter the crankcase so that the PCV valve can pull the blow-by gasses out of it. The PCV valve(with the outlet hose to the intake plenum chamber connected to it)is hidden under the intake plenum chamber on the top of the passenger's side valve cover. It, and/or the outlet hose running from it, is probably clogged(cracked/leaking if it's the hose)and the inlet/ventilation hose is now acting as the outlet hose(full time).

The reason a little bit of oil coming from the inlet/ventilation hose is not unusual is because during periods of acceleration, or heavy engine load, the PCV valve is insufficient at being able to remove all the blow-by gasses. Under those conditions the blow-by gasses, which contain small amounts of vaporized oil, are also drawn into the intake plenum chamber through the inlet/ventilation hose as well as through the PCV valve(and subsequently the outlet hose connected to it)simultaneously. So the inlet/ventilation hose is also an outlet hose for the blow-by gasses during those periods of engine operation.

BTW, if you were to blow into the PCV valve, or the hose connected to it, while it were still installed in the valve cover you shouldn't be able to pass much air through it. It should be, as the FSM states, "difficult" to do so anyway.

Here's the FSM pages for the PCV system for reference.
http://personal.utulsa.edu/~nathan-b...75positive.pdf