Camaro396

iTrader: (14)

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!

sjsingle1

iTrader: (1)

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

sjsingle1

iTrader: (1)

Camaro396

iTrader: (14)

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.

PheonixLS1

iTrader: (4)

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

Z28/2002

iTrader: (27)

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

Camaro396

iTrader: (14)

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?

sjsingle1

iTrader: (1)

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

PheonixLS1

iTrader: (4)

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

sjsingle1

iTrader: (1)

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