Trucks & Trailers - 2008 Ford F350 diesel... fuel question

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03-19-2011, 11:10 AM
Started getting a prompt to drain water separator, and after some home work I located the yellow valve under the driver side door that you open to drain water. That did not work! Changed fuel filter, that did not work. Added "sea foam" I think that was the name of the stuff, to get the water out of the take, that did not work. So whats left to check? Sensor?

Thanks guys..

03-19-2011, 07:31 PM
there are 2 filter's btw, take it to the dealer to see what code it's throwing. might be bad sensor. were you getting fuel out of the drain? i let mine run for a minute or two

03-20-2011, 04:10 PM
There are two fuel filters on this engine, the first one is mounted on the left side frame rail under the driver's seat. It also has a water drain valve. These engines are fussy about fuel cleanliness, they should be changed every 20000 miles maximum. Use only Ford or Racor filters. Also if you are going to DIY buy the 36mm socket for the fuel filter cap, fits both filters

03-20-2011, 07:27 PM
on my 6.0, I had to pull the drain plug on the hfcm and use a can of brake cleaner to clean it out. It was amazing how much gunk drained out. After that my WIF light finally went away. I am prety sure your setup is almost the same. the sensor gets so gummed up with sludge/water that is send a false signal. Might want to check into and see what they say there

03-20-2011, 07:48 PM
cool guys thanks for the info.. I changed both filters, the large one was almost $90 lol... I will open up the valve and let it drain for a while, and if that does not work we will head to the stealership, er dealership :)

03-22-2011, 07:28 PM
Under drivers side on frame is one filter. Has a drain plug you remove. Then up top you remove the cap on that filter. Let crap drain from top filter down through lower filter. Remove cap on lower filter and remove filter. Clean both bowls out. Make sure you clean both bowls out. I would say it again. Clean them good. Then replace the filters with only Motorcraft filters. Install drain plug back in lower housing and start it up. Motorcraft has a patent on the fuel and oil filter on these. It will make a difference been to that school too many times. International teaches it. Then get some PM 22A Cetain boost and use it. Enjoy the truck. Hope this reads ok Droid auto spell can mess ya up.

05-08-2011, 01:42 PM
Huh...everything has been pulled changed and cleaned and the Damn light came back on.. guess its off to the dealer to get jacked out of 2k

05-25-2011, 09:11 PM
any news on the problem?

Joe Dirt
05-26-2011, 08:46 AM
Those sensors are notorious for getting gunked up. Check this out.

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