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The Double Burp Fuel Back Splash
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Mine splashes every time I let the pump auto stop and I would rather not deal with it so I have just used then percentage that my Silver Leaf says I have used and then subtract 5 gallons from 200 gallons. I believe that my tank is actually 208 gallons.
If my monitor says that I am down to 60% I take 200 X 40% so it is 80 gallons and I subtract 5 gallons so I buy 75 gallons. By using this method I stay on 100% for quite a while before it starts to drop. I try not to go past 60 % before refueling and I try not to pull in to a campground with less than 75% so I always have plenty of reserve.
This works for us.
Andy
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Our 2000 XLV didn’t puke and our 2000 H always pukes. I found that pumping on highest volume minimizes it but always get a burp of fuel. I know about how much it will take and stand off about 5 gal from that. A quick swipe with the windshield cleaner and we’re gone. Wipe the area next time we stop. Seems to be a Prevo quirk on more than less of our busses. Geo.
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Our previous Bluebird Wanderlodge frequently “burped” and I learned early on to grab some paper towels, stuff them tightly around the nozzle, which solved the problem of fuel splashing out and making a mess. Current 06 has never belched on me
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Is it possible the pump has something to do with it? Or the way you stick it in there? (bracing for comments on that one!) We don’t have much of a problem with belching – and for the most part we fill at flying J. Both the rv and truck islands.
I did read your post op – the delayed burp… like there’s a wave in there that bounces back at you! I really wonder how that happens.
i Also tilt the bus to stuff more in there… maybe that helps?
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In doing some research I found that after VIN 1-7605 (our VIN is before that) Prevost started installing a “floating ball type check valve assembly” as standard equipment on both sides of the 208 gallon fuel tanks.
In the parts manual there is a note that reads:
“For Product Improvement Of Spillway, Use Kit # 032413 for VIN Y-7046 to 1-7605”.
It looks like a retrofit kit of the floating ball type check valve assembly at the entrance to the fuel tank on both sides.
Is this worth considering, or am I just a whining newbie?
I wonder if temporarily increasing the drop angle from the filler neck to the tank, using the level low to tilt the coach, as suggested, would help?
Thanks
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Is this burping issue unique to the duel filler coaches? Mine is single fill with no issues. I remember this issue being discussed on the plastic coach Forum and it was specific to duel fill coaches.
I don’t remember them coming up with a solution to it?
Harry
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When I refuel I always lean the coach to the passenger side. I then open the passenger side fuel cap for vent and fill from the driver side. 90% of the time this works great. If I do not do this the pump will cut off at anything above a trickle of fuel. I don’t get the burp back, I just cannot fill the tank.
Tom Hamrick
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Tom,
I’ve thought about cracking the other side for venting, but isn’t there a risk of overflow on that side? I always lean the bus to get more fuel in as well.
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I think maybe the two Tom’s have it…
I did some research on the problem I had seen on the plastic coach forum because it seemed like they came up with with a solution? The solution was two fold.
If you’re filling from the drivers side, open the passenger side as well. Tom, I don’t remember anyone saying that fuel came out the other side.
Most said they didn’t have a problem filling from the passenger side without opening the drivers side. And those who did said the problem was solved by opening both fills.
What I don’t know is if the Prevost duel fills is drastically different than the duel full systems on a plastic coach?
Harry
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Fuel burping was generally a issue with the vehicle that came with the plastic fuel tanks. The previous stainless steel tanks had baffles in them them and that helped to cut down this fuel back splash. The kit that is mentioned above, 032413 was created to put a cage with a ball in the fuel path into the tank. When the fuel nozzle shut off that pressure in the tank from trying to get out through the fuel fills.
One item you need ot check is the vent tube that is installed on the top of the tank. It has a hose attached to it and it was routed to the opposite side of hte tanks and then down the side of the tank. Through time and hot fuel the plastic tank expands and it may squeeze shut this hose. NOw the tank cannot release this built up pressure while the tank is filling. I would check this first. The access to the top of the tank is on the entrance door side of the coach and it is in the upper left corner of the third compartment. The panel is a stainless metal square with a rubber seal behind it and it is held in place by a number of small metric nuts. You should be able to see this access but many of the converters covered it with carpet. So you may have to search for it.
Once inside you should see the hose attached to the vent assembly and heading off to the other side of the tank. You may not be able to pull it out. If you think that it is crushed or pinched just cut if off and put a new hose on the assembly and route the hose to one of the far corner of the tank where there is usually still space for the hose to feed down toward the pavement.
As to the retrofit kit it does help but it is tricky to install. The piece on the side with the access panel is relatively simple to do. The one on the opposite side is hard to access with the tank still in the vehicle. Many times the fuel tank is drained and dropped out of the vehicle to make the access easier for that one side.
Check the vent line and you may be able to reduce greatly the splash back.
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I’ll definitely check the check the vent line.
Thanks for the insight!
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One thing I have learned owning 3 H’s, all with OTR air is, I ALWAYS fuel on the passenger side, and that side only. Because if you get a burp on the driver’s side, and the door seal on the inside of the OTR bay door, which surrounds the fuel door is not completely 100% leak free, you will get a diesel fuel smell inside the bus as soon as you turn the OTR air on. The OTR fans are powerful enough to suck the fuel by the seals.
So, at truck stops, I lay the drivers side handle down, and use the opposite side handle to fill.
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Jerry, never had the diesel smell from the OTR, but I see your point (our seal must be good), but from now on I’m going to do it your way. Geo.
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I feel mine on the driver side bus level full throttle and have never had a burp or back splash
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Mike, now I am envious.
I wonder what the difference is?
Is your VIN after 1-7605?
If it is, maybe you have the floating ball type check valve assembly factory installed as OEM.
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