I have a 2011 F350 6.7 with approx 22,000 miles. I have had issues with the water in fuel light. When it first came on I followed the procedure in the owners manual, never noticed any water in the fuel, and the light went out. It seems to come on more when the climate is damp, rain and snow. Every time I have ever drained the fuel, I have never noticed any water.
I have had the fuel filters changed three times since I have owned the truck. Always by the dealership and with Ford filters.
The last fuel filter changed occured approx 2 months ago at Buhler Ford in Eatontown, NJ.
The light came on last night and I drained the fuel, again with no water observed. The light would not shut off and engine power was reduced. I again dained fuel this morning 02/09/2013 and no water was observed. The ligh would still not shut off.
I took the truck back to the dealer. The non diesel tech looked at the truck and found a plug that was unplugged from the fuel filter area under the truck!
Im guessing what ever tech did the last change out forgot to put the plug back in?
He found a code that said it could be that the water in fuel sensor could be faulty or the fuel could be contaminated???
He also said that all additives in the 6.7 are no good and not necessary. I have been running Stanadyne additive in my truck since it was new andhave never had an issue?
Has anyone else had a similar problem? Please help