I am wrapping up a frame swap on my 97 4runner Limited. I reused my gas tank, fuel lines and evap box and such. I did swap the fill neck.

Now my issue is that my 4runner wont take fuel. Gauge shows 1/4 tank, and was working correctly when I began the swap. The gauge showed around a 1/4 tank just before the swap. When I went to the station to get fuel, it takes about 1/4 gal before backing up out of the fill neck, down the side of my runner....

The only lines that I disconnected where right in front of the tank. They where the pressure line (feed), return line, and the Evap box line. I assume thats the vent/purge line. I pulled the fill neck hose off the tank and stuck a screw driver down into the tank where I found a flapper door. I pushed gently against the flapper door until it opened. As soon as it opened you could hear a little bit of pressure being released. I assume that was keeping the door closed preventing fuel from flowing into the tank... After hearing the pressure vent, I put the fill neck back on, and went back to the station. Same thing, 1/4 gal and it backs up. I come back home, pull the neck back off, and fuel runs out of the neck and is standing in the gas tank fill opening. I again run my screw driver down into the opening where I again push on the flap. I bubble of air come out of the tank and the remaining fuel falls into the tank. Once the pressure is vented, the flap moves freely and take almost no effort to open. The weight of the screw driver resting on it is enough to open it...

has anyone had this problem before? does anyone have a diagram of the fuel lines and there correct location? would anyone be willing to crawl under there 4runner and look at how yours is set up? (96-00 with the evap box on the left inner fender)

[QUOTE=Yotaoffroad27;2143131]I am wrapping up a frame swap on my 97 4runner Limited. I reused my gas tank, fuel lines and evap box and such. I did swap the fill neck.

Now my issue is that my 4runner wont take fuel.


Have you cleared the vent tube that connects to the factory air box? Blow through it, could be an easy fix. Other than that ive had trouble with the sending unit on top of the tank and the pattern in which i plug the wires in. Keep us updated and let me know if you have already tried clearing the vent tube.

I am unaware of a vent tube running from the tank to the air box. There is one that goes to the charcoal canister, then lo the air box? The other vent runs up to where the gas cap is. I have not checked either of them yet. It's been raining...

FIXED:

I im not 100% sure, but I am assuming a Dirt Dobber had been working in the vent tube between the tank and gas cap. I ran an old dip stick into the tube from the tank end and pulled a bit if dirt out. Now it takes fuel fine... Shew....

Hell yeah! Thats awesome man, glad you fixed the problem.

Yes, I was talking about the vent running to the charcoal canister then to the air box. Sometimes it clogs and causes the same problem.