What's this?

[ZMagnum]

Is this a cold start injector? Vacuum line for something?

20335

[MidnightSXT]

Vacuum line for..something.

[S L U G]

Pcv?

[Junior]

It's a vacuum line, Mark, but I forget for what exactly. When we did the shaved manifolds, some guys routed them underneath (Hammer did his in rigid tubing). I bought some rubber hose that fit over the diameter of the tubing itself, cut little nipples from the existing tube, and ran hose underneath the coilpacks, sorta.

[ZMagnum]

It's a vacuum line, Mark, but I forget for what exactly. When we did the shaved manifolds, some guys routed them underneath (Hammer did his in rigid tubing). I bought some rubber hose that fit over the diameter of the tubing itself, cut little nipples from the existing tube, and ran hose underneath the coilpacks, sorta.

Cool, thanks. It would certainly look better if it was routed differently.

[89grand]

I always wondered what that was too. It looks almost like a spark plug wire even though I knew it wasn't that.

[Junior]

If you follow it back, it routes behind the manifold to a canister mounted on the passenger side firewall. I'm not sure what it is or what it does, but the plastic tubing will slide out of the rubber boot pretty easily, and you can see it's just tubing.

[Super T]

I think that vacuum tube is for the evap system (emissions).

[Bryali]

Maybe it's a vacuum secondary for the warp drive? LOL

[glhs837]

I think that vacuum tube is for the evap system (emissions).


Ah, that triggered a Neon meory that might explain it. Sounds like tis the source of vac for the NVLD, or Natural Vacumm Leak Detection system, or whatever its called on this car. See, if thats what it is, it supplies a vac source to the fuel tank. A sensor monitors that vac, and if it goes away, it triggers an EVAP fault code.

Most common cause of this is the infamous "Did you tighten the gas cap"?

[ZMagnum]

So what happens to this if you are running a blower? It's not a vacuum anymore.

[glhs837]

In the Neon SRT-4, this line was actually on the far side of a venturi fitting, so even in boost, there was vac. Even so, this isnt a constant thing, and your still drawing vac enough that it shouldnt matter. If you get worried, toss a check valve in there so it can only draw vac from it, not put pressure into it.

[1fastsedan]

So what happens to this if you are running a blower? It's not a vacuum anymore.
Haven't had a problem and my blower has been on almost a year and a half. It probably just not under boost long enough and then evacuated right away when you're back under vacuum.