Compression Ignition Addict
Join Date: Dec 2012
Location: Woodside, California
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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.
1996 ECLB 4x4 81k miles
DIY 6637, Hpx, E4OD
First boat Arcturus
2008 Kubota L-39
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Last edited by Arcturus; 09-03-2013 at 12:26 PM.