Sensor or Fuel problem? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 02-06-2011, 12:23 AM Thread Starter
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Sensor or Fuel problem?

My truck started acting like it was running out of fuel, I changed the filter, ran great for one day, back to the running out of fuel,(when I changed the filter it was not completely full of fuel when I took it out of the truck)and when I changed the filter the water sepertor that screws into the bottom of the filter, felt funny like it want to strip the threads out, so I changed the filter and the seperator ran good for about 2 hours, now it is running worse than it was before, I let it sit for about 5 hours, I did nothing to it, starts up and runs good for about an hour then runs poorly again, my question is, can it only be sucking air sometimes? Do I have an electricial problem? Please help this is driving me crazy
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post #2 of 4 (permalink) Old 02-06-2011, 03:24 AM
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Try running with the fuel cap loose.Sounds like cap is not venting.
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post #3 of 4 (permalink) Old 02-06-2011, 08:43 PM
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Originally Posted by Shelpster View Post
My truck started acting like it was running out of fuel, I changed the filter, ran great for one day, back to the running out of fuel,(when I changed the filter it was not completely full of fuel when I took it out of the truck)and when I changed the filter the water sepertor that screws into the bottom of the filter, felt funny like it want to strip the threads out, so I changed the filter and the seperator ran good for about 2 hours, now it is running worse than it was before, I let it sit for about 5 hours, I did nothing to it, starts up and runs good for about an hour then runs poorly again, my question is, can it only be sucking air sometimes? Do I have an electricial problem? Please help this is driving me crazy
Thank you,
Shelpster
Have you looked at the threads on the WIF sensor? if it felt like it was stripped then it could be sucking air there

fuel cap? i dont think that would cause this but who knows, it sounds like an air leak in the fuel system to me

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post #4 of 4 (permalink) Old 02-09-2011, 03:30 AM
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As these engines don't have a fuel transfer pump, if the fuel tank doesn't vent properly it will create a vacuum and starve for fuel and stall.
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