Thought this might be of interest to any of you guys with diesel trucks or diesel powered equipment. Company I work for just purchased a 2006 Ford 550 diesel with a sandblasting unit on the deck. Fellow that owned it said it hadn't been used for quite a while but it was in good condition. Overall, looked and ran good so they bought it. Company takes it to the local Ford dealer for the once over, replaced a few gaskets and seals etc. and did their "check mark" safety and general inspection, all good to go. Boys get 3/4 of the way to a job and she starts running bad, won't pull itself, sputtering etc. Finish job and limp back to nearest Ford dealer because they won't get home with it. Ford service shop says "must do a computer diagnosis" and they got it figured. It's a leaking fuel rail, 4 new injectors, etc. etc. and they road test when done. Hmmm... same problem, change some more things, and TA DA, now its fixed. Our guys pick it up and get 3/4 way back to base and it starts doing same thing again. I get involved and take truck to a real diesel repair shop. Tell him our story and leave it with him. Few hours later get these pictures. Old diesel, and probably some water, in the tanks has turned to mush and goop, so bad it has sucked the plug right out of the side of the fuel sender in the one tank. Filters are crushed, poor truck just about sucked its tailpipe through the injectors! Long story short, total bills for Ford garages $13,000 and neither shop changed the friggin' fuel filters. Diesel shop "mechanics" first thing they checked and TA DA, found the problem. I guess fancy Ford computers can't tell "technicians" to check the fuel filters first. filters are first thing