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Topic: Gas tank vacuum vent w/ carbon filter box - remove?? (Read 1795 times) previous topic - next topic

Gas tank vacuum vent w/ carbon filter box - remove??

I'm putting my 3.8 back in my car, and I'm wondering what the purpose is of this big box hanging around.  I originally thought it was venting fumes from the tank into the intake for a little bit of a richer burn, but apparently this carbon filter is removing all the fumes.  Is there any reason to keep this here?  Could I bypass the box and put the gas fumes directly to the intake, or just take it all out and lave an open breather on the fuel tank?
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 3.8 V6 - Rescue
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 5.0 V8 - Survivor

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #1
Leave the charcoal canister as is. DO NOT REMOVE IT AND PIPE IT TO THE INTAKE!!! If not leave it out and vent to atmosphere. But it is better to leave in in place as the purge cycle will richen up the mid range and it is beneficial.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

 

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #2
So its better to have metered ventilation than just a regular breather, is it much of a difference?  I was thinking if i left it on i could relocate the box
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 3.8 V6 - Rescue
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 5.0 V8 - Survivor

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #3
You can relocate it for sure. But i normally leave them hooked up and functioning.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #4
On my old Sport, i stuck the line in a hole in the frame rail. everyone kept telling me i had turned my car into a bomb by venting the fumes into be rail but i never had any problems.
Currently Birdless but never Foxless

86 Mustang GT

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #5
What would be the bad/dangerous side to just leaving it a breather
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 3.8 V6 - Rescue
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 5.0 V8 - Survivor

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #6
you will smell gas.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #7
Well that wouldn't be too bad I guess, having a bit of gas smell.  I guess capping off the breather is not a good idea?
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 3.8 V6 - Rescue
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 5.0 V8 - Survivor

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #8
I think most posting on this issue do not know how this system WORKS.

1 It stores HC gas fumes by exorbing it. CHARCOAL app the equivalent of 2-3 ACRES

2 when the engine sucks the fumes out of the canister(PURGES IT) it makes the mid range a little richer.

3 It keeps the car from smelling like GAS

4 It keeps tuns of Hydro Carbons out of the atmosphere. That"s a good thing dont you think!!
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #9
my vac line popped off of it, and it smelled like I had a gas leak or an open gas can Inside of the.car till I found it off. just leave it.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #10
makes the mix a little richer, so you mean the carbon filter doesn't filter out ALL the gas?  And I know not all cars have a system like this, that's why I was asking if it would be a bad idea to cap the vent off
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 3.8 V6 - Rescue
1988 Cougar LS - Cinnabar/Rose Quartz Metallic two tone - 5.0 V8 - Survivor

Gas tank vacuum vent w/ carbon filter box - remove??

Reply #11
The carbon canister stores the fuems and then the engine sucks it in to clean it out. Then the process repeats itself.:hick::mullet:
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!