I'm in the middle of this LT1 intake swap and have decided to really clean up the engine bay while I've got everything torn down. I've already ditched the air pump and co., heater and it's associated piping, all the EGR stuff. Looking over things tonight, if I get rid of the evap can, I will have almost no vacuum lines to hook back up. I'm thinking all I need now is vac to AFPR, brake booster, PCV, cruise, and headlights (I think). Anybody have a negative experience ditching the evap can and plugging the line from the tank?

you know what thats a good question, i ripped mine out yesterday and i remember it went to the carb, when i first got it 4-5 years ago and startd rebiulding it, i put a carter on it back thenn, i just put a chrome sleeving kit on it, (now its pretty much all chrome) and i saw that and just ripped it out. lol

I think the solution there is to remove all the vent tubing from the tank up and plug that hole in the tank. then get yourself a vented gas cap. However I think that the intank pumps for your tpi setup LIKE some pressure in the tank to help them pump so I dont know how much pressure the cap should vent at.

What would happen if I plug the hose. There would just be more fumes in the gas tank, right? I don't think it's that big of a deal. Anybody else?

If you do, be prepared for this: https://www.thirdgen.org/techbb2/sho...threadid=85836

Vader, this thread is about the filler neck problem. I take it you mean get ready to smell the fumes. The more I think about it, the tank must have a vent and therefore I can't just plug the hose coming into the canister. I sure would like to get rid of that ugly can and snarl of lines.

I know of a couple people who just plugged the hose. I did the same. The tank has another vent source. There are actually 4 lines from the tank - feed, return, Evap, and excessive pressure release. The only bad thing is the smell of gas when the pressure is released.

Tim

Steve,

Yes, I wasn't referring to the cracked filler neck, but the general problem of venting fuel vapor out the cap or tank surge/rollover valve.

Have you considered "hiding" the EVAP canister in the void in the inner fender near the battery? You can always get a smaller EVAP canister from a different vehicle to fit the space, then run the hoses in a convoluted tubing cover to "dress-up" the engine compartment. For example, the EVAP canister on my '96 S-truck is located behind and above the fuel tank, and is pretty small. Both of the lines (vent and purge conotrol) are routed to the engine compartment.

Good idea.

id recomend keeping this. i had took mine off and it smelled like ****... this was after i had plug the lines from a motor swap...the canister eventually got saturated and overflowed with gas, so i took it off..wrong idea...

i didnt plug mine, i just lef tit laying there, its fine, doesnt smell, or anything, keep in mind, i also have a 82 4 barrel

If your evap can is cracked or broken, can it be the source of a vacuum leak?

I may be waaayyy off here but here is what I did and why I did it..... The VENT thats on the tank does not curb excessive pressure It ONLY vents air INSIDE the tank.... As in you Use gas it allows air to replace the void so you dont draw vacuum on the tank..Looking at it I suppose if the pressures got really HIGH it MAY actually vent it...But its not supposed to....

All I did was removed the Metal line all the way back to the gas tank.. Plugged the Vacuum line at the TB and removed the canister and just hid the wiring in the main loom....

Then for the vent....First I tried the vented gas cap and plugging the line but with a full tank of gas and some hard cornering I had WET rear quarter.... I did not like it nor did I like the fresh gas scent I got every time I passed the car...

What I did to solve it......Take the rubber line coming right out of the tank..... Remove the metal line to the front of the car....GO TO Autozone or nearest autoparts place and BUY an IMPORT CAR fuel filter.....You know the plastic ones with the clamp on lines..... Plug he tank end against the arrow then take a piece of fuel line aand run it after the flow arrow down past the rear...I did that and wire tied it Back for safety reasons....I have never seen a drop of gas come from it BUT if the event that it did I wanted to be sure at speed the gas would hit the ground and not the exhaust....


Anyhow....the fuel filter provides enough of a buffer to keep any/all smell away and makes you comfortasble to set a heater next to your car without feear of it blowing up..........

WHEW...

Oh yeah another More GHETTO way to do the same this and is much easier especially if you dont have a lift is to KEEP the metal line installed.....Run the rubber hose off of metal line up front....Hide the fuel filter in the front bumber area and have the outlet hose face the ground....JUST in case....Again as I said Ive never seen a drop of fuel with mine set up this way...and I get no wet fender and When I take my gas cap off no PRESSURE hiss...


Kenwood
ICON MOTORSSPORTS OF CINCINNATI