I got a new cold air intake for my truck... The little hose that fits on the side of the old intake doesn't want to fit on the new one.. My question is.. is this absolutely neccessary to have connected? Thanks

 

Yes and no. You need to either connect it or plug it. If it is not capped or connected, you will idle at about 1200 instead of about 750. Cap it or make it fit. Unless you like your idle at about 1200.

 

ok so if I cap it ill be good.. What purpose does it serve connected? Capped will be the same as if I had it connected? Thanks

 

Thats the breather hose for the PCV.
It won't affect idle speed but if you leave it disconnected you will suck in unfiltered air. (bad)
Just get some longer hose and conect it to the valve cover.
If you just plug it at the air cleaner you should change the breather in the valve cover like the guys with the round air cleaners do.

 

ok i got ya... so if i just get longer hose and connect itback to the side of the intake like on the stock one ill be good?!

 

No, that is not the breather hose for the PCV. That one goes directly from the PCV into the side of the intake manifold. The one you are talking about that coes from the stock air cleaner assembly to the valve cover (opposite valve cover as the PCV) is for bypass gasses from under that valve cover to be sucked back into the intake to be reused. I would not just plug it. I would either find a way to connect it to your new CAI, or I would remove it completley and replace it with a standalone breather on that valve cover.

 

Oh ok I got it now.. Thanks!

 

Last question... so you're talking about something like this right... I just need one

http://cgi.ebay.com/ebaymotors/New-p...spagenameZWDVW

 

Ya, that would work, though I use one designed more like the one in the link below, only made by Mr. Gasket. I buy it at Advance auto for about $5, and replace it about twice a year. I use this type because I don't like the exposed filter like on the one you showed (because of mud and water, etc...). But either will work. You just need to find one with the base that is the right size to insert into the grommet on your valve cover.

http://www.streetperformance.com/ART...00756/4277.jpg

Be aware, some states may not let you pass emissions with that setup. It is technically letting bypass gases back into the air rather then back into the manifold. Some states are picky about that sort of thing.

 

If you click on the cardomain link in my sig, you can see in the pictures of my engine the breather installed on the back side of my drivers side valve cover.