Lots of Problems

[McFalls2014]

We bought our first toyhauler 2 weeks ago. It had sat a while before we bought it and it has been a process getting everything in running order. It has an Onan 4000 generator on it along with the fuel tank and pumping station. Here’s where we’re at.....
There’s a tube hanging from the top of the fuel tank. Vent hose? Nevertheless it’s dripping fuel. Not pouring but its enough to make a noticeably big dead spot in my grass. The tank is building pressure so much that when I unscrew the fuel cap it actually pushed fuel back out. Pump station isn’t working at all. The motor runs but no fuel comes out. The generator will run for approx 30-45 minutes then shut down like it’s starving for fuel. I feel like all of this is linked to one issue but don’t know what it is. Help Please!!

[McFalls2014]

Ron3rd wrote:
I don't know much about your setup but any gas tank I've ever seen was not pressurized and spitting fuel.

Yea thats why we are confused as to what is going on.

[McFalls2014]

Vw triker wrote:
Plugged vent on the fuel cap?

We thought maybe its the fuel cap. On the top of it it says vacuum only so maybe we need a vented cap?

[dedmiston]

Try cracking your gas cap and run it again. If it's not venting properly, maybe it's starving the gen for fuel.

Is it hot where you are? Maybe the tank is so full that its burping fuel out of that lower vent line as the fuel expands.

[Ron3rd]

I don't know much about your setup but any gas tank I've ever seen was not pressurized and spitting fuel.

[Vw_triker]

Plugged vent on the fuel cap?

[Lwiddis]

You are at moving through the whole system checking everything. Fuel line partly clogged?