Cant fill gas tank?

Hi:

This happens when the filler neck needs to be replaced because the vent tube is collapsed inside the filler. Here are instructions in the diagrams below to help you fix the problem. Check out the diagrams (Below). Please let us know what happens.

Is it an EVAP code?

Joe

Hi:
There is a leak somewhere in the evap system. It could be as simple as a fuel cap or you could look for days trying to find it. They can really be a pain. Check the fuel filler steel down tube for rust problems. If no luck, take it to a shop and have the the system fogged. The fog will leak from the problem area so you can find it. Otherwise, you could be looking for some time. It could even be above the fuel tank which requires you to remove the tank to check.

If it isn't something obvesious, the fog will be the best money you ever spent.

The plastic valve is a check valve to prevent siphoning of your gas.

O would be checking the check valve on top of the tank for fuel pressure vapors first. Make sure it aint blocked up. That will cause the pressure to build up and keep shutting off the pump.

If teh diaphragm is old it could have had a hard time moving all the way in the cold. It is possible that you have moisture in the lines and it caused it to freeze and shut it off like a valve.

Check to see if the vent hose is either clogged or pinched. That goes up the filler neck. It may be collapsed inside as well. Unless the flapper valve inside the tank has fomething holding it closed.

I'm not real sure how yours is

i need a filler to modify and put on a old willys jeep fuel tank

this one just so happened to be laying in the bed of dodge ram pickup truck (whether it went to the truck, I do nt know)

yours may be sorta like this--upon looking thru "mitchell i" I could not find a diagram of your system

with my super engineering skills, I think the only real reason for a check ball is for "anti slosh" and might also prevent gas from coming out of the gas cap if the vehicle turned over.

I have seen them broken and floating around somewhere in the tank---and no repercussions occurred, still drove fine, with other vehicles

these too might also prevent a "novice siphon-er" from stealing your fuel. But someone could ezily punch this thing on, into your tank. Its sorda a fragile cage around the ball.

What possibly could happen to one like in my pics, is a small hose, stick or foreign object get inserted into it, and broke off when it was snatched out or was small and wedged itself between the ball and the cage

it's also possible that the "seat" or portion of the cage the ball rests in, when fuel pushes it upward after you are finished installing fuel. This part may be worn from the ball bouncing on it over the years, and the ball simply just sticks or lodges into the seat.

If yours is like this, 1st investigate at an auto parts store, can you get just the plastic "check valve assembly" or must you buy the whole filler assembly (napa, autozone, advance auto are some to check out)or is this strictly a stealership item?

The auto salvage yard is yet another option, and I go there often myself

after exploring what you can do or can get and where it's available.I would remove yours and try to determine if you can simply remove missing action figure "darth vader's light saber" from the assembly and all be like new. Or does it need new parts?

As far as the fuel sender, it is most likely unrelated (but you never know)

if you can live with it. Wait until you have fuel pump problems and the tank must come out anyway to replace the pump and the faulty sender

i'm a great example for you (probably not practical for you) I never worry about running out of fuel on either of my two jeeps, my civilian '77 cj 5, as well as my '46 willys army jeep, both have 5 gallon cans on the back, mostly for me. But have helped those stranded too!

Let me know what you find, I hope it's ez!

The medic

That depends on what is leaking and your going to have to determine that. You will probably have to remove the tank to find out. It sounds like the filler neck though

Hi guys. It's common for the pump assembly, actually the rubber gasket, to leak if the huge plastic nut isn't tightened all the way. There's an arrow molded into the tank and one on the nut. If they are not lined up, even by a couple of inches, it won't seal.

Caradiodoc

As I said, your likely going to have to remove the tank to find out what is leaking. It depends when it leaks the most, during filling, only when the tank is full or only when the engine is running. All would point to different things.