EVAP canister question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

swb85 · 02-15-2007, 03:32 PM

I want to remove the EVAP canister from my truck, it's not hooked up to anything besides the fuel tank, and I'm tired of it just wasting space. My question is about the line on the canister that goes to the gas tank.....what do I do with it? Can I just plug it or is that the only vent for the gas tank?

swb85 · 02-21-2007, 03:36 PM

bump......anybody?

grinch4om · 02-21-2007, 04:43 PM

yes , it is your only vent. drill an eighth inch hole down through the center of the gas cap. plug the line. I did it and it works fine

PhilaTruck · 02-22-2007, 12:29 AM

You could do that and it will "work," but the canister does serve the purpose of filtering raw gas fumes and recycling them into the carb instead of out into the air.

swb85 · 02-22-2007, 10:36 AM

Quote:

Originally Posted by PhilaTruck

You could do that and it will "work," but the canister does serve the purpose of filtering raw gas fumes and recycling them into the carb instead of out into the air.

I realize that, but all the lines on my canister have been cut and all emissions equip is long gone so it's not serving any purpose....it's just venting gas fumes into my engine compartment.

Quote:

Originally Posted by grinch40m

drill an eighth inch hole down through the center of the gas cap. plug the line. I did it and it works fine

Aren't most gas caps vented already? I sure thought they were.

Srubydo1986 · 02-22-2007, 06:47 PM

on my donor truck i saw some out put the same vent system for the rear axel on that line for the canaster. Thouth that was a smart idea and i plan to do it in my truck that im building.

PhilaTruck · 02-22-2007, 09:09 PM

Quote:

Originally Posted by swb85

it's just venting gas fumes into my engine compartment.

Well, I'd say that if they weren't venting those fumes to the combustion chambers, inside the engine compartment

, it's not doing any good anyway. Have fun cleaning out your engine bay.

grinch4om · 02-23-2007, 08:36 AM

no most caps are not vented, when the vapor canisters started showing up the vented caps went away. the fumes are vented to the canister instead of to the air hence, "evaperative emissions control" EPA mandated this in what, 75?

02-15-2007, 03:32 PM	#1
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	EVAP canister question I want to remove the EVAP canister from my truck, it's not hooked up to anything besides the fuel tank, and I'm tired of it just wasting space. My question is about the line on the canister that goes to the gas tank.....what do I do with it? Can I just plug it or is that the only vent for the gas tank? __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 02-21-2007 at 03:35 PM.

02-21-2007, 03:36 PM	#2
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: EVAP canister question bump......anybody? __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD

02-21-2007, 04:43 PM	#3
grinch4om dang its hot Join Date: Nov 2006 Location: frankfort kentucky Posts: 1,349	Re: EVAP canister question yes , it is your only vent. drill an eighth inch hole down through the center of the gas cap. plug the line. I did it and it works fine

02-22-2007, 12:29 AM	#4
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: EVAP canister question You could do that and it will "work," but the canister does serve the purpose of filtering raw gas fumes and recycling them into the carb instead of out into the air. __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

02-22-2007, 06:47 PM	#6
Srubydo1986 The Crazy Machanic Join Date: Jan 2007 Location: Nokesville Va Posts: 1,437	Re: EVAP canister question on my donor truck i saw some out put the same vent system for the rear axel on that line for the canaster. Thouth that was a smart idea and i plan to do it in my truck that im building.

02-23-2007, 08:36 AM	#8
grinch4om dang its hot Join Date: Nov 2006 Location: frankfort kentucky Posts: 1,349	Re: EVAP canister question no most caps are not vented, when the vapor canisters started showing up the vented caps went away. the fumes are vented to the canister instead of to the air hence, "evaperative emissions control" EPA mandated this in what, 75?



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