Compression Ignition Addict
Join Date: Feb 2009
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Sounds like water to me. Mine did more or less exactly the same thing..run OK for a while, then wouldn't go above 2000, then run OK...I drained the water separator like 10 times, and it would run a little better for a while...like 10 minutes...I finally changed the filter and before dropping in the new one I drained the bowl completely, poured in some water dispersant (Power service), let that drain out, then filled the bowl to near the top with 50/50 mix of fuel power and fresh diesel. Now it runs 100%.
So, I'd do this with yours. The filter can look just fine, but be saturated with water. Water builds every second the truck runs, as the warm return line fuel hits the cold tank and...condensation results..
2012 F250 With 9'6" Fisher Xtreme V plow.