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Old 02-27-2014, 05:04 PM   #1
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Fuel crap

Getting ready for our spring trip to florida so went out to see what the MH looks like after all the snow melted. First turn of the key it started WOW - then it stopped. HHMmmmmm?

At first I thought it might be some electrical problem that stopped the pump or whatever. Then I went back to look at the water separator filter and saw the unmistakable signs of crap in the fuel. Ran to my nearest NAPA store and picked up two new filters plus the final filter. The Final filter was black and the bowl was all filled with crap. pulled the plug on the bottom of the fuel tank and drained out about five gallons. check for water but none found. fuel was a little cloudy though. Drained the separator and saved the Crap to show what could happen when we store the MH for over a month.

Filled both the filter with 50/50 fuel and 911, turned the key and bleed up the banjo bolt output of the fine filter. Cranked for about thirty seconds and "fiola", we got power folks lets go for a ride.

We ran for about an hour and all is good. Will never let the rig stand so long without draining the water separator again.

Here what was in the filter.
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Old 02-27-2014, 07:58 PM   #2
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Did you put a fuel storage treatment, such as Pri-D diesel treatment
prior to storage ??
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Old 02-27-2014, 08:46 PM   #3
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I think I'd put some diesel fuel algaecide in the tank and carry a few spare filters.
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Old 02-27-2014, 10:03 PM   #4
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fuel crap

It looks like to me it could be either alge or asphalt, in either case it is fixable, with fuel additives for each problem. And alot of fuel filters.The alge is caused by LSF which has much more water in it refining process. Asphalt is caused by heat { from the newer engines 07 @ newer}. They run so much hotter than the older engines. hopefuly this help.

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Old 02-28-2014, 05:14 AM   #5
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you can thank the tree huggers and epa for that
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Old 03-01-2014, 08:18 AM   #6
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Fuel won't go that bad that fast unless you had a raging fungus/algae infection or picked up a bad batch- or both. You need to dose it with algaecide. Another option is to have the fuel "polished," ie, circulated through a large filtration system until filterable impurities are removed. Some people have an extra fuel circuit to continuously filter fuel with an electrical pump, some people pay outside services to do it. It's just an option, but it can reduce dirty fuel hassles. Better carry spare fuel filters for a while. A lot of biofuel mixes are used now, they have advantages and disadvantages. Clean biodiesel will dissolve all of the impurities in an older system and clean it out, but that means the filters clog up a few times until the impurities are flushed. I have noticed that biodiesel mixes seem to become cloudy, perhaps with moisture, sooner than straight old-style diesel, so I use an enzyme additive. Bottom line, and it's been this way forever, filters are really important. I don't care whose fuel you use or where you drive, sooner or later you will get a bad batch of fuel, either with water, or with other impurities. Carry spares.
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Old 03-01-2014, 08:33 AM   #7
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Did you store/sitting your Coach with a "full tank"? If sitting outdoors and not full, the rising and falling temps. will cause condensation on the exposed inside metal tank, then drop/run down the side into your fuel, this is the biggest factor with algae in fuel. Folks talk about bad fuel/gas, The refinery/400+ fuel stations has filters on their pumps, just like your engine filters, water will not pass through the media to well and is soon plugged off. Years ago remember the filters right on the hose connection on most all fuel pumps? Today for appearance, the filters are under the pump cover. So , in ending, for someone to say they got a bad load of fuel/gas........The station did not have filters on their pumps, shame on them. We have had a lot of water/dirt complainant's over the 30 years I have worked there, and the Lab explains to the customer and has them come in to see and explain the pump/filter setup and why they could not of pumped this into their tank at our stations. Any kind of storage tanks, above ground/ under ground/ back of pickup trucks, look next time, they all have filters on the hoses.
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Old 03-01-2014, 09:34 AM   #8
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Quote:
Originally Posted by girlydogs View Post
It looks like to me it could be either alge or asphalt, in either case it is fixable, with fuel additives for each problem. And alot of fuel filters.The alge is caused by LSF which has much more water in it refining process. Asphalt is caused by heat { from the newer engines 07 @ newer}. They run so much hotter than the older engines. hopefuly this help. Ben
Makes me wonder how a hotter motor can affect the fuel in the tank. ?
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Old 03-01-2014, 10:32 AM   #9
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I've had similar problems. Trust me, the f/s warning light and the screaming buzzer going off while driving will sure wake you up if you're sleepy! I now only fuel up at truck stops that test their tanks daily for algae and water. Jubitz Truck Stop (in Portland Oregon) may be a bit more expensive but it's a lot cheaper than replacing fuel filters or being stuck on the road. Regular gas stations may be less costly, but they don't pump enough diesel to keep it algae and water free.
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Old 03-01-2014, 01:26 PM   #10
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asphalt

Asphalt is in your fuel feom the refiner, it is in all diesel fuel. In the pre 04 models there was no pollution controls {egr Puttingexhaust back into the crank case more heat}, then 07 they put more heat into crank case dpf &egr which adds more heat. 2010 they added to the mix urea. With all the extra pollution equiment the exhaust gas that is going back into crank case is hotter than before> So the return fuel is hotter, allows the asphalt to crystalize instead of being burned & sent out the exhaust.Not the tect.explantion, but that lets you see the ideal.
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Old 03-01-2014, 01:32 PM   #11
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Not sure where you are getting your info. , but Asphalt is the bottoms of crude oil refining and sold for asphalt paving, it is not in your gas or fuel.
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Old 03-01-2014, 02:49 PM   #12
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Not sure where you are getting your info. , but Asphalt is the bottoms of crude oil refining and sold for asphalt paving, it is not in your gas or fuel.

Cummins makes an additive for Asphalt removal or to keep it liquid. I have some in the MH but am to lazy to go get it, I think it is called Asphaltene Conditioner. You can find it on Cummins web site.
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Old 03-01-2014, 02:51 PM   #13
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There are asphalt particles that is left in the fuel refining process. diesel fuel isn't well refined product of the refining. If you have asphalting bad you can see it in the fuel tanks.
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Old 03-01-2014, 03:08 PM   #14
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Some reading: Asphalt Production and Oil Refining | Pavement Interactive
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