Custom Evap Canister Replacement

[freepowder]

Since virtually none of the smog stuff is operable or even on the vehicle any longer and since the evap canister was plugged and causing problems I found a much smaller replacement:

It's a fuel filter that connects directly from the tank to the orginal charcoal canister vent through the frame. So far working great.

 

[PabloCruise]

Well, I think that is creative, not sure how well it will function under all conditions...

The charcoal cannister is designed to handle a lot of changes in the vapor volume from the tank and "store" said vapors in the top of the can until such time as the engine can manage the combustion of said vapors with the normal intake charge.
The bottom of the can is open to the atmosphere so the vapors can enter freely with no pressure to contend with.
Not sure what the top of your filter is connected to? If it is the existing charcoal can purge line, it should be "switched" so that the purge occurs at times when the engine should not stumble from the vapors. If you are just puching the vapors in, you may get stumbling at inopportune times...

BTW, you live in a beautiful part of CO!

 

[freepowder]

Well, I think that is creative, not sure how well it will function under all conditions...

The charcoal cannister is designed to handle a lot of changes in the vapor volume from the tank and "store" said vapors in the top of the can until such time as the engine can manage the combustion of said vapors with the normal intake charge.
The bottom of the can is open to the atmosphere so the vapors can enter freely with no pressure to contend with.
Not sure what the top of your filter is connected to? If it is the existing charcoal can purge line, it should be "switched" so that the purge occurs at times when the engine should not stumble from the vapors. If you are just puching the vapors in, you may get stumbling at inopportune times...

BTW, you live in a beautiful part of CO!

It's connected to the line from the tank that went to the charcoal canister, through the fuel filter, to the vent that connected to the bottom of the canister. Fundamentally it's just a vent and the fuel filter is inline primarily to keep bugs and alligators from crawling up there.

None of the plumbing for the original evap system is/was still operable or even in place. I had a lot of stumbling, hesitation and bucking--reminiscent of a plugged fuel filter or vapor lock with the non-op canister in place so I unhooked the line to that tanks and voila! Problem cured. The current set up is just to make it prettier. Girls like to look pretty and the Goose is no exception.

The other option would have been to plug the line from the tank and vent the cap but when I'd vented the cap before I got fuel leakage when it was hot and the tank was full. Prior to evap emission controls, all fuel caps were vented.

Anyway, working brilliantly so far.

 

[keonik]

Can you provide a sketch or picture to your design? I am restoring my 76 FJ40 and it is does not have a canister. Its a long story, but basically I bought my FJ as is.
Anyway, as far as my fuel tank? The tank is an FJ tank that only has one line being used (it was rigged that way by previous owner) which leads directly to the engine. All other lines on the fuel tank have been temporarily capped to prevent leaking. As far as gas pressure? The vented cap have minimized the pressure but not the vapors...
Well, I have two options with safety in mind as I go thru restoration. One, replace and go original ($$$$$) or two look for alternatives / options to repairing this problem.
Anyway, looking for recommendations from anyone who have confronted this challenge.
Respectfully,

 

[freepowder]

Can't help you out with running the lines, much. Was it me I'd check the emissions FSM as to where to pull the vent from. Here's a pic of my incredibly complex 'evap emissions canister.' Just plug the vent line into the fuel filter and the fuel filter into the hardline that goes into the frame.

When I say 'fuel filter,' we all understand this NOT the fuel filter that goes between the tank and the fuel pump but a new, separate one that keeps bugs, snakes and giraffes from crawling up the vent line, right?

 

[keonik]

Awesome . Will try recommendation and thank you for picture display. Take care

 

[norsk]

great idea. I spent time in cleaning my under body and all three lines (fuel, return and vent) to/from the tank and have been wondering whetheer to do a canister with the SBC installed. I will first try that "fuel filter canister" idea. It is small enough

dougbert

 

[freepowder]

great idea. I spent time in cleaning my under body and all three lines (fuel, return and vent) to/from the tank and have been wondering whetheer to do a canister with the SBC installed. I will first try that "fuel filter canister" idea. It is small enough

dougbert

It's been working for over a year, no issues and solved all my vacuum-building-up-in-the-tank-causing-the-truck-to-run-like-crap problems.

Originally I was going to replace the evap canister, but was blown away by the price. Then I checked all the other stuff that connects to the evap system. None of those gizmos and widgets worked. That goes for ALL the smog gidgets and wismos. Not a friggin' one of 'em worked. I don't think most of them are available new and I've been well bitten by Specter's used stuff policy--no returns on untested, broken used crap. Not that I'm bitter. . .