EVAP line
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Junior Member
Joined: Jun 2014
Posts: 23
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From: Iowa
Car: 16' Silverado
Engine: 5.3
EVAP line
Ok guys/gals. I've been trying to find information on this site about where the EVAP (vent line) on my truck, an S10, should be hooked up to when using a TPI setup. I know it's not a Camaro but I like the looks of the TPI setup and want to incorporate it onto my stock engine. From what I've read there is a port on the side of the throttle body that it could be hooked to but I'm thinking that the throttle body I'm using which is a LT1 unit doesn't have that feature. Surely someone has put a TPI setup on a engine that didn't come with it and had to deal with the vent line off the gas tank on a GM vehicle. I'd prefer not to run a vented system like the days of old if I can avoid it. The EGR is going to be deleted as well. Any help is appreciated.
Joined: Dec 2004
Posts: 16,734
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: EVAP line
The egr used a ported vacuum signal that was under the tpi Throttlebody.The lt1 tb would not have this provision.
I think the evap hose from the side of the Throttlebody is manifold vacuum. If that’s what you need tap a signal from the right rear of the plenum.
Thread Starter
Junior Member
Joined: Jun 2014
Posts: 23
Likes: 0
From: Iowa
Car: 16' Silverado
Engine: 5.3
Re: EVAP line
Where on the right rear of the plenum would I do this? Is there already an existing port to hook to?
Last edited by eshaw; Dec 23, 2018 at 10:44 AM.
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