I have the WH 23gal EFI tank assembly.
Which tank? The M1A1, or the Sherman?
It has the 2 evap lines and the vent line from the fuel pump assembly.
Sounds like the Sherman? If so, are you sure that the top vent is actually a "vent" and not the fuel return line fitting?
Been awhile since I messed with a Sherman, but if you have pictures, that would be great. I've got some around here, but you might be able to post yours before I can find mine!
I believe this solution may work for me by ulitilizing the 2 evap lines into the stock lines and through the plastic tank into the small tab on the charcoal canister.
Probably correct. Sounds like you're retaining the condensing/recovery tank in the cab? Are you still using your stock metal charcoal canister, or updating to the higher mounted plastic one? If the latter, then you might as well remove the inside-the-cab tank. Unless you just don't want to.
It'll work either way.
Just make sure that you utilize the existing line that originally went to the canister from the plastic tank. There were two from the main tank, and one from the aux. tank (do you have two tanks?). But only one from the main tank was a "vent" where the other was a "liquid return" line.
If you still have the original line routing, just connect the two from the main tank to the new tank, the original one to the aux tank, and the remaining one that ran along the frame to the charcoal canister.
Then run the vent line from the fuel pump up to the larger tab on the charcoal canister.
Whoa there! Vent line on the fuel pump? Negatory there morning glory. Nothing on our vehicles ever goes from a fuel pump to the charcoal canister.
Do you have a specialized fuel pump? Or one from another application where there is a separate canister on the pump? Or maybe even one of the early vacuum pumps for vacuum wipers?
Got a pic of yours?
Then use the same mushroom cap on the same charcoal chamber and the other charcoal chamber to my intake box on the fender well for my EFI intake. This would be all pre air filter.
The mushroom cap is for the unused large port. Just slip it in and don't try to attach anything additional to it. That what you were saying?
The other large port will go to the air box. Great that you have one! Do you have pictures of it you can post up? An air box is the perfect location for the canister venting.
Should it be put in the air line post MAF?
Nope, do it just like you said before. In to, or ahead of the air filter element. I don't have an enclosure/box, so will put a fitting into the base of the air filter itself. With your enclosed box, you can easily fit it to the box and avoid most of the fumes that might not make it immediately into the engine. While the engine is running, it should all get sucked in. While the engine is off, an open element cleaner can still let some fumes out. Less than if you just vented your canister to the outside, but some might still escape.
But it's sounding like you've got the perfect setup for this.
Does that sound like it would do the job? Based on everything I've read in these forums, and I'm under no illusion that I've read it all, this should do the trick without using the purge valves and such electronically.
Correct. Should work perfectly.
BTW, I have a 74, hence the name, with an explorer EFI setup and custom air box with the above fuel tank assembly.
Sounds like you've got all that you need to retain your original system. If you have, or will in the future, change to the '76/'77 style of plastic canister like pictured above, you can completely eliminate the plastic tank inside the cabin and never have fumes inside again from a leaky tank.
You can also use just one vent line from your tank, and cap off the other one. After all, one was a vent originally, and the second was a simple return line for condensed vapors to return to the main tank as liquid.
Paul
