Fuel Filter issues....

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So, Last friday I had a #6 fuel injector go out on me while driving. I Wanted to narrow down the problem to injector or wiring so I swapped 4 and 6 injectors and viola bad injector since problem swapped over.

Replaced the injector truck runs great.

Well looking through my maintenance logs I created for truck I was approaching the 15000 mile mark for fuel filters. So I decided to do a huge routine maintenance. Changed coolant filter, oil filter, added T6 oil. Recharged K&N. Well now for fuel filters.


I removed the fuel filter here is what I saw








Black sludge all over primary filter. It also has evidence of collapsing. Also note that these ARE NOT Ford filters. When I first bought these fuel filters, I compared them to the power stroke filters and they were the same in every way. (these are car quest brand) The new filters pictured now are car quest brand and they no longer have the fiber woven sock around primary filter.


So I am concerned. Obviously this is most likely what caused my bad injector. My concern is what the deuce caused this? Bad fuel? Water? Plastic tank deteriorating??

My plan is to replace filters again in 2000 miles and check for the sludge or dirt. If it looks bad, the tank is getting dropped. However, after fuel filter change the truck runs smoother and better than I can remember. So this obviously got crappy over a long period of time and not over night.

Anyone have any insight???

[dannyboy950]

Definately some cruddy fuel there, probably a combination of dirty fuel and tank deteriation, lot of restriction of fuel flow. The early trucks were bad for that.

Can definately cause injectors to clog up with the really fine particals getting thru the filter.