Hey guys, quick question. I'm doing a set of longtubes on a 99 LS1 Camaro for a friend, and they're the "race headers" without the EGR/A.I.R. provisions, so I'm deleting both of them for him. It's been so long since I've done this though, and I can't remember what to do about this fitting in the back. I dug out my stock LS1 intake and I had a cap on this small nipple fitting in the back (that points to the passenger side when installed on the engine) so do I just unplug the little vacuum line and put a cap on there? Or what?

The nipple fitting in question I circled in RED. Can I just cap this and remove all the lines? Thanks!

 

you can cap it off at the back of the mani.....PITA to get back there......unless you have the mani off......or you can cap it off at the sensor switch ......num 5 in the diagram

 

 

Where does the other end of that T nipple go, the one that's not hooked to anything? I always see it in pictures, but don't remember mine having a T fitting, and every time I see the picture the other end of the T (right side in picture) is never hooked to anything.

 

How do u plug it at the sensor. Do you have pics???

 

The other side(to the passenger side) goes to the HVAC system, it's what switches between the defrost and dash vents

 

Oh...so I guess I probably shouldn't remove the T fitting and cap off the nipple coming out of the back of the intake like I had on mine?

 

the sensor ......num 5 in the diagram.....has 2 vacuum lines ........1 goes to the back of the mani....at the T in the pic.......1 goes to the AIR setup.......plug the 1 that goes to the AIR.......the AIR is that big black plastic doughnut lookin thingy

 

And u just leave the hose going from the sensor to the mani alone??

 

yep.....ran it that way for a yr until i finally got a LS6 intake to put on......then i capped it off at the T