Probably a really stupid question. But I just want to know what this inlet is and what exactly its used for. Its on the left side of the engine. Sorry for the noob question.

Oh its also the 4.0 engine

 

looks like something that a vac hose connects to

 

x2

 

it goes to the breather tube if im not mistaken

 

Anyone have any pictures or just tell me how and where it goes?

 

if your standing in front of the truck wich side is it. wanna double check myself.

 

If your in front it would be to your left. About 5 inches behind the alternator. Or behind the oil cap

 

ok its deff the tube that goes from your intake to you valve cover if you dotn have one get a section of hose that will go from it to the intake it will be maybe a foot and a half at the most if and it should connect to the intake on the throttle body side of the mas air flow. its more then likely on the bottem of the tube.

 

You by chance know what it does? Its been unplugged since the last time i checked. Maybe a month honestly. Seems to run fine still

 

its part of the venting system it brings filterd air inside the crank case the the only bad thing is it bringing in anything like dust, water, bugs and its allowing it to be in side your crank case. wich will lead to oil passages stopping up and other parts to be destroyed.

 

Im guessin its ran to the intake then. theres a hole there too

 

Yes, it's the PCV Closure Tube between the large fresh air tube and the PS valve cover. Without it, the engine is sucking dirty air directly to the throttle body/IAC and also through the engine internals to the PCV valve and then to the intake manifold. The air/fuel ratio is affected because unmetered air is entering the engine through both leaks.

IIRC, the original parts were a plastic tube and a rubber elbow. Fix it ASAP.

 

Would my gas mileage be poor from it being unplugged? im deff fixing it asap!

 

At idle and light throttle, the oxygen sensors may be able to correct for the lean condition, so you may not see that much fuel economy difference after it's fixed. The most important thing is getting the engine sealed up against the dirty air that is getting in now.

 

All fixed up now. Thanks for the info and help!