i would almost bet you got some fuel that was contaminated with water at a fuel station. i see you live in lousiana....is there any chance somewere you fill up may have had water contamination from the hurricane????......anyway, i would try replacing the fuel filters....and run it. if it was only a small amount of water.....you may be ok....if the problem persistas you may have to dropp the tank and clean it thouroughly, and i had one this winter that filled up in reno right after it flooded, that had so much "gunk" in the fuel/water seperator housing i had to replace the housing..........just a guess....but water has to come from somewhere and that is what that couldy gunk is.......diesel mixed with water.......Marc