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Old 11-11-2014, 06:32 AM   #1
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Fuel related problem

I believe I'm having a problem with my 2000 Dutch Star with a ISC 300

I can start out in the mornings with a full tank of fuel and drive approx 6 to 8 hours and then the problem arises. The engine starts acting like its starving for fuel, bucking and having a hard time keeping up its speed. The tank will be close to half a tank at this point. Stop for the night and procede the next morning with a fuel tank and the same thing happens again around a half of the tank used.

Please any help would be appreciated.
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Old 11-11-2014, 06:48 AM   #2
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I would first change the fuel filter (s)
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Old 11-11-2014, 07:18 AM   #3
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I would try to run most of your fuel out, and change your fuel filters again! Has your MH been sitting? If so, you may just have some water cond. in your fuel. If not, then you might have got some bad fuel! try to run it all the way down, fill up at a station that sells a lot of fuel! Look inside the filters when you change them, pour them out in a clean container, if bad, you can cut them in half, and see what is inside. Good advise to fuel where the big trucks fuel! hope this helps? Rail!
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Old 11-11-2014, 07:38 AM   #4
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If anywhere near boating areas, you might be able to locate a fuel polishing service. They use a portable filter system to super ckean the fuel. It works very well if they can access the tank thru the fill. You haven't lived till you've had to polish 450gals in a boat for 8hrs. Ask me how i know!!
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Old 11-11-2014, 07:54 AM   #5
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I had that happen, it was the electric lift pump. If that's it you want to replace it before it wrecks your injection pump$$$!
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Old 11-11-2014, 08:04 AM   #6
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Just change your filters as the filters set over night the particles fall off the filter only to be stirred up the next day to plug the filter again.
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Old 11-11-2014, 08:08 AM   #7
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Algae????
This is a common problem in humid area.
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Old 11-11-2014, 08:28 AM   #8
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Could also be a vacuum problem. At a rest stop after a couple hours loosen a fuel cap and if you get a rush of air in or fail to have the same problem you found the culprit. But again fuel filters and fuel pump if equipped.

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Old 11-11-2014, 09:32 AM   #9
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Considering that it takes 6 to 8 hours for this to happen, I think your fuel tank vent is plugged. The design of the vent varies by manufacturer. On many it is a length of hose attached to the top of the tank.

If you can't easily find the vent, try driving for a day with the fuel cap off or loose. If that solves the problem, then you know what to fix.

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Old 11-11-2014, 11:04 PM   #10
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I had a similar event with an old gas fired MH. Turned out to be a failed in-tank connection on the fuel pickup tube. Fuel pump sucking air starved the engine. Had to empty and drop the tank to get at the problem connection.
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Old 11-18-2014, 08:05 AM   #11
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To let all you guys that replied to my thread about the fuel starving on inclines, it turned out to be the fuel caps on the tank were car caps non vented and had so much suction in the tank, it was pulling up the Algae from the tank and clogged the filters. Looking to have my tank flushed and polished as they call it.
Thanks again for all your help guys
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Old 11-19-2014, 01:22 AM   #12
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That's good news! Glad to hear you solved the problem.

Jim
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Old 11-19-2014, 12:00 PM   #13
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Thanks. It had all the earmarks of an unvented fuel tank problem, but its always good to know the diagnosis was correct.

It's not clear you absolutely need to have the fuel polished and the tank cleaned. You said the problem self-corrects overnight, apparently without changing the filters, so it doesn't sound as if algae is a significant problem.
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Old 11-19-2014, 03:43 PM   #14
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Gary, they want around $800 dollars to clean the tank. I clearly have Algae in the tank and it is filling up the filters but I believe with using some bio products that kills the Algae and keep changing the filters for a while it will be ok.
Do you agree with this analogy
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