Where does the vacuum line on the OEM bypass valve go?

mcpotus · 05-25-2022, 11:59 AM

I'm putting my car back together and I came to the point where I realized that the OEM bypass valve on the TMIC has a nipple for a vacuum line that goes off to the passenger side. The problem is I have no idea where the other end of that hose is supposed to connect to.

Everything I've seen online just has that hose already connected on the engine side. I couldn't find a routing diagram for this in the FSM either. Really at a loss here.

It's the small hose on the BPV that points to the right then curves back towards the left:

In the parts diagram, it is the hose with part number 1AB14:

The problem is that on my car there is no nipple on the manifold like that diagram has for the vacuum hose to connect to.

Any help would be appreciated

EDIT: This is for a GR STI. I've found a bunch of resources for WRXs and other STIs that involve a tee of some sort, but mine didn't have such a thing when I removed it.

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Jedi03 · 05-25-2022, 12:15 PM

iirc its below the throttle body...

mcpotus · 05-25-2022, 12:25 PM

Quote:

Originally Posted by Jedi03

iirc its below the throttle body...

Nice, I think you're right. You helped me to narrow my search a bit better, and I found what I think is what you're talking about:

The photo isn't my car, but I'll check shortly.

mcpotus · 05-25-2022, 01:58 PM

Found it - it was indeed underneath the throttle body. Fairly easy access with the TMIC off.

05-25-2022, 11:59 AM	#1
mcpotus Scooby Newbie Member#: 528561 Join Date: Jan 2022 Chapter/Region: W. Canada Vehicle: 2011 STi Hatch	Where does the vacuum line on the OEM bypass valve go? I'm putting my car back together and I came to the point where I realized that the OEM bypass valve on the TMIC has a nipple for a vacuum line that goes off to the passenger side. The problem is I have no idea where the other end of that hose is supposed to connect to. Everything I've seen online just has that hose already connected on the engine side. I couldn't find a routing diagram for this in the FSM either. Really at a loss here. It's the small hose on the BPV that points to the right then curves back towards the left: In the parts diagram, it is the hose with part number 1AB14: The problem is that on my car there is no nipple on the manifold like that diagram has for the vacuum hose to connect to. Any help would be appreciated EDIT: This is for a GR STI. I've found a bunch of resources for WRXs and other STIs that involve a tee of some sort, but mine didn't have such a thing when I removed it. * Registered users of the site do not see these ads. Last edited by mcpotus; 05-25-2022 at 12:18 PM.

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05-25-2022, 12:15 PM	#2
Jedi03 Scooby Specialist Member#: 491095 Join Date: Sep 2018 Chapter/Region: SWIC Location: New Mexico Vehicle: 2009 STi Blue Blue	iirc its below the throttle body...

05-25-2022, 01:58 PM	#4
mcpotus Scooby Newbie Member#: 528561 Join Date: Jan 2022 Chapter/Region: W. Canada Vehicle: 2011 STi Hatch	Found it - it was indeed underneath the throttle body. Fairly easy access with the TMIC off.