1998 Foretravel U295 - Air in fuel system question

Topic: 1998 Foretravel U295 - Air in fuel system question (Read 7979 times) previous topic - next topic

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #200 – August 17, 2025, 12:16:28 pm

Quote from: rvquestion – August 17, 2025, 11:40:21 am

Sorry 50' hose cost is 250.00

you might try these folks https://www.fisheriessupply.com/trident-marine-series-365-barrier-a1-marine-fuel-hose/365-0586 great folks to deal with 3/8 x 50 152.00, 1/2" 162.00, 5/8 198.00

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #201 – August 17, 2025, 02:01:56 pm

Edmond, it sounds like we have pretty much the same coaches, that is with a c8.3 engine with a P7100 Bosch fuel pump. If that is the case, and you know you do not have a CAPS injection pump, here is what I have done.

My fuel lines are original, guess I got lucky on em. The coach starts....instantly....no matter how long it has sat, which is typical for these non computerized engines. I replaced my original fuel primary filtration system with a Davco, and in doing that I opened my fuel lines and they drained back to tank. Couple reasons I went to the davco filter, one I suspected my primary filtration assembly to be leaking air, and the other being that I picked up a load of bad fuel and wanted to be able to see the actual condition of the primary filter. (Im not suggesting you install a davco, just relating my experience.)

I was able to prime my lines/filter with the prime button on the engine mounted fuel fpump. It took some doing, but found it easy to operate the primer button by taking about a 4' long piece of 1x2 wood, levering it against "something" and doing the prime ritual from above with bed open rather than standing on my head and operating primer. So, in my experience there was no need to pressurize fuel tank, install aux electric prime pump (though one would be nice)

If I were in your shoes, I'd get 5 gallon jug of fuel, and connect a short piece of hose to the intake of your filter assembly which, as I understand, you have recently replaced, hopefully with fresh o rings for filter, clear filter bowl, etc. Turn key on to open fuel solenoid. Do the prime thing on the lift pump on engine. Crank her up (it may be necessary to crack a couple injector lines if they have air in em) and let it run a while.is but don't let it suck air. To be double dog sure, I'd probably add more fuel to can, keeping fuel line submerged in diesel, even while adding fuel, let it sit overnight and see if it starts right. If it runs ok then you have found your problem, a leak in fuel supply between filter and tank, bad lines, loose fitting etc. Or insufficient fuel in tank but sure you checked that.

One more thing...the Davco filter I installed has a check valve that prevents fuel drain back to tank. I assume your Racor has the same. If that check has somehow failed it would be a problem.....

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #202 – August 17, 2025, 02:50:37 pm

I made a sketch from my learnings

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #203 – August 17, 2025, 03:22:43 pm

Edmond,

I may be having a hard time following, but back on page 6, in reply #135, it sounds like you got it started and running just fine with a short hose into a fuel can until the fuel ran out. You could try that again using Chuck's idea in reply #201. Use two fuel cans so that you can add fuel to the can that has your short hose in it. 10 gallons get you more than enough run time. If you do get it running that way again, I think you'll have confirmed that your old lines need to be replaced. Also remember to raise the coach while the air pressure is up so you can put the stands in.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #204 – August 17, 2025, 05:28:43 pm

To answer you question on the sketch is Yes. The hose will be almost in the middle of the bulkhead and will be the only hose that comes down from the end of the cable tray.

Mike

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #205 – August 17, 2025, 06:06:40 pm

Quote from: rvquestion – August 16, 2025, 11:06:37 am

One of my son says, buy yourself a travel trailer and get done. Hahaha

Read post 179
Your Son may be correct
Do not exceed 3.5psi
You may soon be chasing cracks in your tank

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #206 – August 17, 2025, 07:30:14 pm

I've added compressed air to a couple Foretravel tanks through the fill neck without issue by using rags or a rubber glove with a slit secured with a zip tie. Pushed fuel to the back no problem, they also had vents.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #207 – August 18, 2025, 01:20:13 am

Yes dave , it did run it using canister and a short hose
Now i am trying to find out
A- my bad hose need to be replaced
B- the 30 feet hose full of air does not get primed
Using hand pump
C- if there is a splice on the hose , causing the
Leak

If i use a long hose going along the side of the coach to the tank ( the tank to be like a canister)
And the engine run after priming it,that tells me the problem is not air being in 30' hose, and it proofs that i have a bad hose
But what if , it still didn't run ?

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #208 – August 18, 2025, 12:50:44 pm

So far i learned the when i pull out my tank ( half way) all four suply and return hoses are long enough to follow the tank without being disconnected from the other ends?
What about the vent hose now?

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #209 – August 18, 2025, 04:11:31 pm

Dumb question, why don't you just replace your fuel lines?

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #210 – August 18, 2025, 05:09:44 pm

I don't mind
But , what if i replaced the hoses and it still didn't stay running?

Remember, I kept mentioning the RV in the storage. It's in a tight spot.
Cannot be towed by a big rig, not enough room in front of it, not only that I don't want to be towed and get damaged
I will replace the hoses when I get it to my shop even if the problem was solved
Because in order to keep this safe on the road, I want to have peace of mind by having new hoses there
But replacing them in a storage yard is not easy In
If I make sure that I need to replace the hoses on the spot, I don't mind to do it because I have no other choice
The question is how to make sure the hoses are the problem
I think my last option, to use a 30 feet external Hose, using the fuel tank as a canister will answer this question
That's what I am working on , ordering Trident, hoses and use it as a temporary Fuel Line from the tank
if the engine stays running, then I will have to
replace it knowing that was the problem
There may be a very small chance that the problem is something else like leaking air in the system from another source, the splice in the hose, it cracked filter housing, stock check valve
Or else
And I am doing this because some of the members suggested " don't jump to the conclusion by replacing the hoses. You may have other problem."

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #211 – August 18, 2025, 05:19:38 pm

I don't remember if I did ask this question does anyone know if our existing push on fittings will fit Trident hoses?

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #212 – August 18, 2025, 06:15:27 pm

Quote from: rvquestion – August 18, 2025, 05:19:38 pm

I don't remember if I did ask this question does anyone know if our existing push on fittings will fit Trident hoses?

yes they will. HOWEVER if you scratch the Barb that slides into the hose you will need a new fitting. Just be careful taking them off the old hose.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #213 – August 18, 2025, 06:42:08 pm

Quote from: bbeane – August 18, 2025, 06:15:27 pm

yes they will. HOWEVER if you scratch the Barb that slides into the hose you will need a new fitting. Just be careful taking them off the old hose.

Agree. Only cut partially through the hose. Sometimes moderate heat on the hose makes it more pliable and easier to remove.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #214 – August 19, 2025, 10:40:39 am

Attach is the hoses that Foretravel is using in Texas
Which one is better Trident or these?

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #215 – August 19, 2025, 11:28:02 am

That's a good question. I expect it would be easier to pull it through a chase a opposed to rubber line. Might have greater abrasion resistance. Probably more advantages for production environment, more compact, color coded.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #216 – August 19, 2025, 12:27:47 pm

Then I wonder why most people who replaced the fuel lines have mentioned Trident,

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #217 – August 19, 2025, 12:29:32 pm

Quote from: rvquestion – August 19, 2025, 12:27:47 pm

Then I wonder why most people who replaced the fuel lines have mentioned Trident,

They were not aware of the other hose

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #218 – August 19, 2025, 01:37:01 pm

So which one I should use the one that Foretravel installs or the Trident brand
Actually, I don't know the cost of the Brown one
And it cannot be ordered from Foretravel

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #219 – August 19, 2025, 02:07:50 pm

The new hose uses compression fittings. I would go with the trident hoses, since your fittings you have now will work.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #220 – August 19, 2025, 02:17:48 pm

Do all four hoses have a straight connector on each end
This is in case if I need to order new ones for Parker hose

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #221 – August 19, 2025, 02:18:55 pm

Thank you, Turbojack

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #222 – August 19, 2025, 03:41:20 pm

Quote from: rvquestion – August 18, 2025, 05:09:44 pm

But , what if i replaced the hoses and it still didn't stay running?

I thought your test with the 5-gal fuel can verified that the engine will stay running (until it drained the 5-gal supply) using a separate fuel line? If so, this seems to point to your fuel lines leaking air so the fix should be the fuel lines.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #223 – August 19, 2025, 04:14:21 pm

Yes, but one of the members mentioned since I replaced the fuel pump as well. The long hose coming from the tank may have drained all the fuel back in the tank and the whole hose it's full of air. It is not easy to prime that.
That's why I'm thinking this could be the case otherwise yes I agree if this is not the case then my hose is leaking
That's why the plan was to pressurize the tank in order to get Fuel running through this hose coming to the engine site and make sure there is no more air in it and then trying to start the engine
If after a while didn't stay running that tells me for sure. The hose start leaking suddenly after I purchased the RV.

Re: 1998 Foretravel U295 - Air in fuel system question

Reply #224 – August 19, 2025, 04:17:31 pm

By the way, any easy way to cut the caulking or silicone around the panel covering the driver side tank to be able to remove it?

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