96 OBS Black fuel filter - Ford Powerstroke Diesel Forum
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Old 09-03-2013, 12:04 PM
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96 OBS Black fuel filter

Got a 96 OBS with 215k on it and have noticed longer starting times as well as loss of performance. I pulled the fuel filter and replaced it and when I did I was disgusted with the condition of my old one. It was BLACK, I mean like soot black and had oil or oily residue on it. One of my buddies says injector seals are toast, the other says I got a cracked cup/cups. anyone have any positive answers as to where I need to be focusing my attention?
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Old 09-03-2013, 12:20 PM
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When I bought my truck it had been sitting for a few years and before I drove it cross state to my home I had new a new filter, some new sensors installed etc.

Fast forward about a month or so later I checked out my fuel filter and it was as black as you described in only about 1200 miles. I didn't notice an oily film though. Since my truck had been sitting idle for a few years before I bought it I was told and have since read the same opinion, that because of algae forming in the fuel tanks over time, it has a tendency to make your filter black.

I checked my filter again recently and it is still nice and clean. I had used fuel treatments. My front gauge did not work for while either but after about 7 tankfuls with additives it is now working again. In fact my rear tank gauge still does not work, I believe I still got some nasty stuff in there.

If you don't use your truck much or tend to use one tank more than other, this is a possibility.

Last edited by Arcturus; 09-03-2013 at 12:26 PM.
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Old 09-03-2013, 01:45 PM
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Well that makes some sense. I use my truck all the time, I just never use my rear tank. Last week I was pulling a cargo trailer for our guide business and filled both tanks. I ran the second tank on the way home for probably the first time in almost a year. I will have to check that. thanks
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Old 09-03-2013, 02:17 PM
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^^^^^^ Classic "use it or lose it" scenario. Always best to rotate tanks. NOT switching tanks is also a good way to get a stuck gauge sender float, and/or failed tank switcher. Even if you only drive one tank's worth between fill-ups, when you run one tank down and fill it, switch to the other tank, and vice-versa.
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Old 09-05-2013, 07:09 PM
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Your injector O-rings need to be replaced.
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