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  #1  
Old 03-10-2011, 08:59 AM
leon leon is offline
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Whenever I refuel my 2004 Ram 2500, it foams up and shuts off the pump nozzle prematurely. I can usually get about 2 more gallons in the tank after it 1st shuts off. Do others have this same issue? Is there anything to be done?

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Old 03-10-2011, 10:01 AM
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Is the gauge reading full when it kicks off the first time?
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Old 03-10-2011, 01:31 PM
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Quote:
Originally Posted by leon View Post
Whenever I refuel my 2004 Ram 2500, it foams up and shuts off the pump nozzle prematurely. I can usually get about 2 more gallons in the tank after it 1st shuts off. Do others have this same issue? Is there anything to be done?

regards,
Leon
That is the nature of diesel. It has a low surface tension which causes the foaming. Nothing can be done other than to try and trickle fill it if the pump will allow. My Duramax held another 2-3 gallons as well after shut off.
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Old 03-10-2011, 06:50 PM
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Diesel foams... nothing you can do to stop it. I can generally get another 5-10 litres if I let it settle in my SuperDuty.
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Old 05-17-2015, 08:49 AM
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Its normal for distallates to foam. Its caused by the detergent additives and air mixing.
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Old 10-23-2015, 01:05 PM
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I've had my '04 2500 QC SLT for less than a year now. When I fueled up I always just stopped fueling when the pump clicked off. I was a bit concerned that with what I assumed was a full tank (34 gal) and an average MPG of 18-20 that the DTE (distance to empty) reading on my trip computer was always under 500 miles with an expectation closer to 600 miles. Since this is my first experience with a Diesel motor I had no idea that Diesel fuel had such a significant foaming issue. Early on in reading the threads on this and other truck forums I realized that foaming was very common.
Recently, I decided that would try and squeeze some extra fuel into the tank. I don't know if it's a bad practice (I quit doing it long ago in gasoline burners) but I may have an issue. Since I did my "uber top-up" my DTE has remained in the mid-500 mile range in spite of driving over 100 miles!

Is it possible that the fuel sensor is "stuck" in the full mode? It remains to be seen if the fuel gauge will start to indicate usage and the miles add up. For now, I'm using the odometer as my fuel gauge.
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Old 10-23-2015, 09:53 PM
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The float in the tank has a maximum limit, anything filled beyond that it can't account for, I have always described my fuel gauge as 5/4ths, you've got that first 1/4 to get it down to Full, then the last 4/4 to get it to empty if that makes any sense. Since this is your first time filling it all the way up the computer is still basing it off of what you've done in the past but now you have more fuel to burn before the float starts moving again which is why the DTE hasn't moved, but it will learn over time if you keep top-up filling up like you should.
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Old 10-28-2015, 06:30 PM
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Quote:
Originally Posted by CdnoilRAM View Post
The float in the tank has a maximum limit, anything filled beyond that it can't account for, I have always described my fuel gauge as 5/4ths, you've got that first 1/4 to get it down to Full, then the last 4/4 to get it to empty if that makes any sense. Since this is your first time filling it all the way up the computer is still basing it off of what you've done in the past but now you have more fuel to burn before the float starts moving again which is why the DTE hasn't moved, but it will learn over time if you keep top-up filling up like you should.
I understand the maximum limit of the fuel gauge but wonder why wouldn't they want it to more accurately reflect the actual capacity of the fuel tank ?
Mainly, I was worried that the float got stuck at the maximum limit. The gauge IS now functioning so that worry is over. I'm not so concerned about the accuracy of the DTE prediction but I DO like to know when I'm approaching the 1/4 tank level. The last thing I want to do is totally run out of fuel.

Bottom line then is that it's OK to "Top-Up" to the point that the fuel is actually visible in the filler neck?
RipVan
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