fuel gets below half tank engine starts to cut out - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 06-20-2007, 01:11 AM Thread Starter
 
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fuel gets below half tank engine starts to cut out

I have the same problem on two trucks the exact same thing they both have new injection pumps and lift pumps theyv'e put additive in the fuel changed filters checked pressure's but it seems when they get below half tank is cuts out the trucks have two 50 gallon saddle tanks plus the original fuel tank there all plumbed together any help would be nice.


01' Dodge 3500 24 valve ATS 5600 ATS Manifold 916,000 miles, 02' Dodge 3500 24 valve 5600 850,000 miles
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post #2 of 8 (permalink) Old 06-26-2007, 02:30 AM
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well it sounds like you are either losing fuel pressure or have a hose leak in your fuel tank. If i were you i would turn the key on and listen to the fuel pumps in the tanks and the lift pump down by the starter. the lift pumps on these trucks are less than mediocre. If they cant push fuel to the injection pump the injection pump might somehow be getting air in it once the tanks get down so far so i would just listen to the pumps and go from there.
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post #3 of 8 (permalink) Old 06-26-2007, 02:38 AM
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:iagree

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post #4 of 8 (permalink) Old 06-26-2007, 11:47 PM Thread Starter
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we've ran stock pumps the entire life of these trucks and never had problems like this no leaks pumps are good
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post #5 of 8 (permalink) Old 06-27-2007, 01:34 AM
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Check for air as a possibility...

Buckler

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post #6 of 8 (permalink) Old 06-27-2007, 02:36 PM
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You are asking a stock lift pump to do something it was not designed to do and that is draw fuel from three seperate tanks. Unless you have had your tanks designed that all three will always have the same exact amount of fuel in them as the others at any one given time, you are going to experience the problems you have now. I will bet you that one tank is getting down below the others and is causing cavitation problems.
post #7 of 8 (permalink) Old 06-28-2007, 01:27 AM Thread Starter
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Thats what i thought when i started working on this thing but everything is equalizing just fine and we've bene running this same setup on all 7 of our trucks since they we're new in 92,96,98,01,and02 just a thought
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post #8 of 8 (permalink) Old 06-28-2007, 02:54 AM
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I would still bet on cavitation issues. Sorry, but I don't have any other ideas. Hope you get it figured out.
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