Well the first thing I would do if I were you is replace the spin-on fuel filter as I am convinced mine was clogged by the ULSD, or rather all the crud it loosens up. I now recall one station I was at a couple of months ago that the pump was REALLY slow on and they claimed they had to change the filter twice since they started receiving the new fuel...

I stripped the heads on both of the shutoff bolts so I am going to have to drill them out when I do the rest of the fuel leak repairs after removing the intake manifold. I decided now to wait and order all of the plastic fuel lines and replace them too even though they are less than 2 years old only because replacing the seals on them costs nearly half as much as the entire line does for each one, so I figured I would just start will all new lines, all new seals and do the IP delivery valves at the same time, probably the week after Thanksgiving. For now the car runs great again after changing the fuel filters so I am less concerned about the leaks as they are only a (stinky) annoyance for the time being. Of course if they get worse before then I may be forced into action.

I haven't looked into the tank screen...I really think the main spin-on filter is the one which catches all of the crap loosened up by ULSD. Once I replaced that one yesterday the car was back to being like new again, just smellier.

Oh, and one more thing...I am going to buy a spare spin-on filter the next time I am at the dealer and carry it in my trunk. It only take 5 minutes to change it and the idea of being stranded by a clogged filter is absolutely silly now that I know how fast that can happen it has frightened me into action!

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz