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Oh, you probably need a vented cap. Sorry. Just being a smart a$$. It really shouldn't build pressure in the tank, though. You can't be returning as much to the tank as you draw out even with EFI. Some of it gets used and therefore not available for return. If anything you should be creating a vacuum. In either case you need a vent somewhere in the system.
Hope my ignorance sheds some light.
Tim
74 Bronco Ranger halfcab w/toys: lockers f&r, wristed arm, C4, D20, hyd assist steering, 37"MTRs, warm 302. Capability, that's what I'm talkin' bout.
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Heat and sloshing of fuel releases vapors that build up the pressure. I had a '66 Fairlane once that built pressure like that in the summer time. Never had any trouble in the winter. Dirt dobbers had built a nest in the metal vent tube.
'72 TBA...
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I will try the vented cap first since it will be less expensive than a canister and see what happens. Thx.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.
mokin:
Roads? Where we're going, we don't need roads.
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Chuzie-I had the same problem with pressure building in my tank. I have and EFI set up with an older high capacity tank that has an extra vent line that was capped off. I extended this vent line so it would tuck up in my rear quarter (above my tank) and put a one-way check valve at the end of the line to let the pressure out of my tank. works, but I'd be interested in a vented gas cap.......anybody know who sells them?
Time, Money & Effort
Laurens County, SC
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Gotcha. I capped off the third port too. I am just concerned that I could potentially vent fuel through that line since I think it was designed for a charcoal canister.
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.mokin:
Roads? Where we're going, we don't need roads.
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wild horses sells vented gas caps. might help the problem but not 100% sure it will fix it.
East Coast Surplus & Tactical
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Maybe I bought a vented cap the other day? It is identical to the one WH is selling. Maybe that is why is was letting the fuel drip out from the cap instead of blowing a line in the tank?
'77 351w- Explorer EFI, 4R70W, 4-link, lockers, 4.56, 35" MT/Rs with a severe rock addiction.mokin:
Roads? Where we're going, we don't need roads.
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chuzie Wrote:Maybe I bought a vented cap the other day? It is identical to the one WH is selling. Maybe that is why is was letting the fuel drip out from the cap instead of blowing a line in the tank?
that is possible. maybe nick will be able to help. (nhopman) he is running efi on his eb.
East Coast Surplus & Tactical
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Man chuzie I hope this all works out !!! :xyxthumbs:
NOW post SOME VIDEOS ... :hysterical: :hysterical: :hysterical:
Waiting to build or BUY another legend! :thefinger:
Always an EB fan, lover and freak :notworthy:
1985 Yoda 4Runner :xyxthumbs:
