I tested the relay per the DieselGiant instructions. It acted goofy at first, then seemed like it was working.

I can't think of anything except that it is messed-up inside. I can't believe that 6 contacts were bad when they looked perfect.

If it acts up again I am going to replace it.

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1991 350SD (updated rods)
Biodiesel B100 when I can find it.
Dino when really cold outside