Vacuum fitting under TB???
Thread Starter
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Vacuum fitting under TB???
What exactly does that vacuum fitting do? What does it connect to? On my '86 there was a sensor attached to the back water neck bolt that this vacuum connected to. There was another vacuum fitting going to the 'bowl' thing directly under the plenum. What is that vacuum for?
Sheesh, I feel stupid right about now.....
Sheesh, I feel stupid right about now.....
Burning Brakes
Joined: Nov 2000
Posts: 1,040
Likes: 2
From: BowlingGreen KY
Re: Vacuum fitting under TB??? (VetteNoob)
If this is what you are talking about it goes to the gas vapor charcoal canister, hooks up by the check valve in the picture. 
Sorry for the double post, I screwed up.
[Modified by KYVette90, 4:09 PM 2/12/2002]
Sorry for the double post, I screwed up.[Modified by KYVette90, 4:09 PM 2/12/2002]
Thread Starter
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: Vacuum fitting under TB??? (KYVette90)
That's it, but it connects to a sensor under the plenum which is also connected to the 'bowl' looking thing in the center of the intake. Hmm....
I'll see if I can find a digi cam and post pics ASAP.
Thanks.
[Modified by VetteNoob, 4:12 PM 2/12/2002]
I'll see if I can find a digi cam and post pics ASAP.
Thanks.
[Modified by VetteNoob, 4:12 PM 2/12/2002]
Burning Brakes
Joined: Nov 2000
Posts: 1,040
Likes: 2
From: BowlingGreen KY
Re: Vacuum fitting under TB??? (VetteNoob)
If its in the center of your intake its your egr valve(bowl looking thing). The switch you are talking about would be your egr control solenoid. You should have one vac. line that goes to the solenoid and from the solenoid you should have another one that goes to the egr valve. I can take a pic of mine if you need me to just ask. :cheers:
Thread Starter
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: Vacuum fitting under TB??? (KYVette90)
Here is what I got.
This is the bowl thing.
This is the sensor thing.
The sensor thing has a vacuum tube going to the bottom of the TB and the bowl. Im confused. :confused: The sensor was attached to the block via the rear water neck bolt. It is currently not 'mounted' to the car as I've got the water neck off.
[Modified by VetteNoob, 5:26 PM 2/12/2002]
This is the bowl thing.
This is the sensor thing.
The sensor thing has a vacuum tube going to the bottom of the TB and the bowl. Im confused. :confused: The sensor was attached to the block via the rear water neck bolt. It is currently not 'mounted' to the car as I've got the water neck off.
[Modified by VetteNoob, 5:26 PM 2/12/2002]
Pro
Joined: Jul 1999
Posts: 741
Likes: 0
From: Eagle IDAHO
Cruise-In I Veteran
Cruise-In II Veteran
Re: Vacuum fitting under TB??? (VetteNoob)
The bowl thing is your fuel pressure regulator, and the sensor thing is your EGR switching relay. It is usually bolted down at the left rear of your manifold.
Drifting
Joined: Sep 2001
Posts: 1,875
Likes: 27
From: Long Beach NY
Re: Vacuum fitting under TB??? (NHVett)
I just did this on my '86 (changed thermostat) one hose goes to EGR, one hose goes to vacuum source, both are connected to the EGR solinoid, which is held down by the rear thermostat housing bolt. I think they added the Tee in '87 or so.By the way the thin nylon hose broke on mine, PEP Boys was the only one around who stocked it.
Barrier
Barrier
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Thread Starter
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: Vacuum fitting under TB??? (Barrier)
Mine broke too. I just went to Pep Boys and got vacuum hosing and made the necessary connections using just the hose.
**stupid front water neck bolt SNAPPED. Tried a bolt extractor, Vise Grips, BAFH, nada.....Im waiting on a manifold from CA to arrive to replace the mainfold**
**stupid front water neck bolt SNAPPED. Tried a bolt extractor, Vise Grips, BAFH, nada.....Im waiting on a manifold from CA to arrive to replace the mainfold**
