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EVAP line

Old 12-22-2018, 12:38 PM
  #1  
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Location: Iowa
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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.
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Old 12-22-2018, 06:53 PM
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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 thatís what you need tap a signal from the right rear of the plenum.
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Old 12-23-2018, 11:41 AM
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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; 12-23-2018 at 11:44 AM.
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Old 12-23-2018, 07:23 PM
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Join Date: Dec 2004
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Car: 1967 Camaro, 91 z28
Engine: Lb9
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Axle/Gears: J65 pbr on stock posi 10bolt
Re: EVAP line

Next to the fpr line. In f body’s this is a hvac vacuum port.
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