2008 Tioga. Fuel shut off problem?

[cgmartine]

I just bought a used 2008 Tioga class c with a ford V-10 Triton engine. While going up a slight incline on the freeway, the engine starting bucking, then quit. The generator would run then quit. I read in the owner's book that this engine has a fuel shut off which cuts off fuel in case of an accident. I was not in an accident but I suspect this may be the cause. Has anyone experience this? Is there a way to deactivate this shut off device? Thx

[j-d]

Fuel Filter Change Thread With Pictures

[cgmartine]

My understanding is that the engine fuel pump is inside the gas tank. That must be quite a task to remove, unless it has some kind of trap door. As for the fuel filter...I don't know that they replaced that. That's something I will need to check. Thx.

[j-d]

cgmartine wrote:
fyi. Found it was the engine fuel pump.

Thanks for the update. We wonder when we don't hear back, so results are really appreciated.

Wanted to clarify... "engine fuel pump" is the electric pump in the fuel tank, right?

Did they also change the "engine" fuel filter? By that I mean the steel cartridge one in the driver side frame rail under the cab. New in-tank pumps come with a new filter screen but that one doesn't trap particles as small as the frame-mounted does.

EDIT: I went back to look for how many miles on the Tioga, which would suggest how many gallons went through that filter. Based on gas mileage, 30,000 on an RV is like 100,000 on a car. You may want to change it soon. Inexpensive and easy, but you do need a less-than-$10 disconnect tool.

[cgmartine]

fyi. Found it was the engine fuel pump. It was replaced and I now have a working Tioga. They also worked on the generator and it runs perfectly.

[PaulJ2]

The only thing common here is the fuel/fuel tank. Either contaminated fuel plugging the filters, or--maybe fuel tank venting system problem. Like above, try driving with the fuel cap loose.

[dakdave]

listen by fuel tank as ignition is turned to run.
Does fuel pump run ?
Most of the fuel filters are mounted horizontal and any water lies in the bottom.On a steep enough incline the motor can get a slug of this water.
Check fuel pressure as this will answer a lot of questions.

dave

[fordman17]

If it's been parked a while and has ethanol in the fuel it will make the gas to thick to pump and will burn up the pump .

[cgmartine]

Thanks for your responses. I won't find out what was wrong with it until Monday. I am really hoping they find out exactly what happened. With my luck, it will start for them at the first click and they won't be able to reproduce the problem. I need to know the problem exactly, otherwise I will be afraid it will leave me stranded again.

[carringb]

cgmartine wrote:
I think I can rule out water in the tank. Just before this happened, my son, who was following me in his car, stopped at the same Valero gas station and got gas, but from a different pump.

Larger fuel stations usually have at least 2 tanks for regular, sometimes more. I don't think most of them cross-pump. I have see stations close off a bank of pumps because one of the tanks ran out.

[1995brave]

Check to see if the gas cap was replaced. Try loosening the gas cap and then run the generator, if it runs fine then try finding a vented gas cap.

[OldRadios]

I just checked my manual for the Onan 4000 (gasoline) generator and it has it's own fuel pump and filter inside the generator housing.

[cgmartine]

I think I can rule out water in the tank. Just before this happened, my son, who was following me in his car, stopped at the same Valero gas station and got gas, but from a different pump. However, I think the regular gas come from the same underground fuel tank. He did not have any problems with the gas. Furthermore, the generator does start and runs for about 5 to 10 minutes, then shuts off, which leads me to believe that it is not a water issue. Does the generator and engine share the same pump? If so, the pump would need to operate to fuel the generator even with the engine off...which leads me to believe the culprit might be a shared fuel filter.

[Red-Rover]

cgmartine wrote:
I just bought a used 2008 Tioga class c with a ford V-10 Triton engine. While going up a slight incline on the freeway, the engine starting bucking, then quit. The generator would run then quit. I read in the owner's book that this engine has a fuel shut off which cuts off fuel in case of an accident. I was not in an accident but I suspect this may be the cause. Has anyone experience this? Is there a way to deactivate this shut off device? Thx

It's not the accident cutoff switch. Once power to the fuel pump is interrupted, it would stay that way until manually reset.
I would vote for condensed water in the fuel tank and a pick up tube that gets submerged when the tank gets tipped on a hill.

[j-d]

I don't think any fuel injected Ford can have genset pulling gas from the road engine's pump or lines. First, that pump's pressure would blow past the needle/seat valve in the genset's carburetor. Second, an external fuel pump (like a genset has) cannot pull gas through a high pressure (EFI) Ford pump that has failed or isn't running.

Find the fuel cutoff safety and trip/release it a couple times. Looks/feels a lot like a home circuit breaker. But I don't think it's your problem.