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Fri Mar 28, 2008 7:22 am

If the tank line is vented directly into the TB, you will basically pressurize your gas tank when boosting the car. And when the car goes into vacuum (when cruising, not at idle, throttle plate is below port "P"), you will suck the air in from the gas tank through the check valve in the fuel cap. At idle, you are basically blocking the vent line (throttle plate is above port "P"). You shouldn't see any effect by this.

Greg, here is the diagram. Hope it helps.

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Fri Mar 28, 2008 7:55 pm

Actually, I was hoping for a real picture of the TVV as I'm not sure what I'm looking for.

Just so I'm clear in concept, after I locate the TVV, I plug both lines coming off of it which is A) the line I accidentally pulled off the charcoal canister and B) the line that's going to the manifold. Then plug the where it connects to the manifold.

With the canister removed:

-Unplug the check valve from the fender, reverse it's direction, and plug it back into the fender.

-Connect the fuel line from the canister (top tube) to the fresh air line from the canister (bottom tube) via a nylon fitting/small fuel filter.



Sat Mar 29, 2008 1:47 pm

You got it right.

Sat Mar 29, 2008 5:29 pm

So anyone have a picture of the TVV? Or a general location...


Sat Mar 29, 2008 5:44 pm

It is on the coolant outlet. It is the only sensor on the outlet that has vacuum lines attached to.

Sat Mar 29, 2008 5:51 pm


This was helpful, courtesy of 6gc.net


Wed Sep 24, 2008 11:55 pm

Couldn't you just block off the line. I think redirecting the line seems like it would waste fuel by vapor. Or is it just not enough to make any difference?

Thu Sep 25, 2008 4:00 am

The idea is its vents the pressure that builds up in the gas tank as it heats up and cools down. if you block it off compleatly, you may have a ruptured tank since that pressure has to go somewhere.

your only loosing a tiny amount (close to what evaporates while you fill up your car)

Tue Nov 25, 2008 4:14 am

I think I have mine done all wrong... when it was warmer I'd come to the shop and find a small puddle of fuel that had leaked from one of those charcoal canister lines. And a really strong fuel smell.
I undid the fuel cap to release the pressure and it seems okay again, but it's way colder nowadays. I'm working on a 165 and from what I read here it seems like the models are all a tad different. I'll check to see where I went wrong, maybe need a check valve?

No Smoking

Sat Jun 13, 2009 3:48 pm

wow I did this mod in 5mins!!! thanks for the write up :D

Re: Charcoal Canister Removal Write Up

Wed Jan 07, 2015 12:39 am

Is it possible for someone to re-host the pictures?

Re: Charcoal Canister Removal Write Up

Wed Jan 14, 2015 11:37 am

Isn't a way to recover the pictures?

Re: Charcoal Canister Removal Write Up

Wed Apr 10, 2019 8:20 pm

Im bumping this one again.. Does anyone have the pictures?

Re: Charcoal Canister Removal Write Up

Thu Apr 11, 2019 7:02 pm

This is such a nice mod to get a little extra room!

What pictures do you need? I can email you whatever pictures you need. I just did this 5 minutes ago.
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