Cummins diesel question

HMM, you posted while I was typing. So, you have the last of the spin-on filters. I would say to check the sensor. I don't think I'd have used diesel that had been sitting in a can in the barn for several months either, but I'm VERY picky about my fuel. I've had a couple of friends have trouble with algae and it's very hard to get rid of. Genos Garage has the WIF sensor if you find that yours is bad. Here is a link, cheaper than I would've expected. http://www.genosgarage.com/prodinfo.asp?number=3831852-S-WIF-DG.