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Old 04-16-2012, 12:48 PM   #1
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Engine fuel pick-up issue

On a recent trip to visit the grandkids, we were on the return leg of the trip when just South of Sweetwater, TX the engine light came on and the engine died. We were not sure what happened. Quickly checking the milage, we covered about 700 miles or 100 gallons of fuel. The tank holds about 128 gallons. The fuel gauge was between one quarter and one half. After towing to the Freightliner shop in Abilene, we found they could not get to our rig right away, so headed home in our toad. So a week later got a call from Freightliner, and they told us they changed out the fuel filters and it ran OK. Then told us it was low on fuel. OK....went to pick it up, filled up to the filler cap, and it came to 100 gallons.

Let me back up briefly here. Once we were stranded, we ran the AquaHot and the generator to see if the tank was below the approximate 1/4 tank level, but at the time we were listing a bit on the shoulder of the road (which didn't help).

We have run the tank below that level before where the low fuel light came on and the generator would not run.

I'm wondering about the fuel pick-up tube and what it looks like. Is there a foot on it with a screen of some kind that may have come off. This might explain the different level of pick-up. Any thoughts out there?

Our rig is a 2002 Windsor. Has anyone out there remember a fillup of over 100 gallons? Thanks for replies.
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Old 04-17-2012, 10:55 AM   #2
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Most people say the tanks only allow you to use about 80% of the listed capacity. That would be just about right on yours. With the tanks almost 8' long and 2' wide, it doesn't take much of a slant in the road to shift 5 or 10 gallons to one side.

Monaco parts often has exploded views of various parts. Maybe they can email a view to you so you can see what's on the end. I'm guessing just a straight tube pickup.

Several years ago there was a post about people who were disatisfied with their generators stopping so early. Apparently, they were able to order new pickups from Monaco. The new ones comes in one length and you cut them to fit. I had thought about it at one time, but decided it was too much work for what it was worth.
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Old 04-17-2012, 11:59 AM   #3
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"...they told us they changed out the fuel filters and it ran OK."

MNB:
I've had filter-trouble on the road (I carry a spare pair on board ... and was able to fix my problem at a truck stop). So I'm wondering: When did you last change your filters?
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Old 04-17-2012, 01:37 PM   #4
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It ran OK

It ran OK until the it sucked air on our way to the fuel station. They thought changing out the filters solved the problem, but after leaving the shop we were so low on fuel, it sucked air again.

The low fuel light did not come on....fuel gauge showed over 1/4 tank of fuel....might be a perfect storm of instrument goofs and a problem with pick up. Extra fuel filters on our list for the next trip for sure.

Thinking we will check with Monaco as to how the tank and pick-ups are set up.
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Old 04-17-2012, 05:07 PM   #5
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I had identicle symptoms, stop engine at 1/4 tank. Oil pressure sensor to ECM was out of limits. It was intermittent, if they didn't read the codes you should have it done.
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Old 04-17-2012, 06:03 PM   #6
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fault codes

They checked and found low fuel pressure faults
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Old 04-17-2012, 07:05 PM   #7
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Quote:
Originally Posted by NMBeemercouple View Post
They checked and found low fuel pressure faults
Okay, has the lift pump been replaced with one compatible with low sulphur diesel?
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Old 04-17-2012, 10:17 PM   #8
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Why would one have to change out a lift pump unless it is faulty. It was my understanding that ULSD is approved for all diesel engines.
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Old 04-18-2012, 04:31 AM   #9
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Why would one have to change out a lift pump unless it is faulty. It was my understanding that ULSD is approved for all diesel engines.
As it turns out ULSD causes the gaskets in lift pumps to shrink. My symptom was it would not idle. It might also throw a warning/stop light due to low fuel pressure. Although you might have run the fuel too low, if you have been at that fuel level before it seems odd for it to quit. If filling the tank has resolved all issues then no worries.
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Old 04-18-2012, 06:56 AM   #10
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ULSD not only has less sulfur, but it has less lubricity. If you have a diesel engine made before 2007, it was not designed to work on ULSD. I suggest using a high quality Diesel Fuel Concentrate especially for older diesels, designed to improve lubricity for fuel pumps and injectors. It will also clean your fuel system to get better mpg and has many other benefits such as improved water/diesel separation, fuel stabilization, and corrosion protection.
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Old 04-18-2012, 08:51 PM   #11
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Damon, still pushing the snake oil?
Cummins states ULSD is compatible in their older engines...its on their site..check it out....
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Old 04-18-2012, 09:03 PM   #12
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Damon, still pushing the snake oil?
Cummins states ULSD is compatible in their older engines...its on their site..check it out....
Of course it is compatible. Especially when Cummins offers their own diesel fuel additives..its on their website..check it out.. "Cummins Filtration offers an array of fuel additive products to enhance the fuel system performance and support new emission standards. Changing regulations that have lead to the use of biodiesel blends and ULSD fuels have created unique maintenance needs across the globe. The addition of high quality fuel additives is now an important element in every good diesel engine maintenance program."
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