I ran her today with the fuel heaters off and she ran like a champ. Took it for a spin around the block and back, got the engine good and warmed up, and all was well. This is with what was in the tank, which is, if I remember correctly, about 15% WVO.

I was shocked when I turned the key off and it kept running ... then remembered that I'd disconnected the vac to the shutoff valve. hooked it back up and it shut off right away.

So ... it appears that fuel viscosity is critical to this thing running. My next move is going to be running some more cleaner through it. It did improve dramatically with the Diesel Purge. I have half a gallon of "silver" Power Service Diesel Kleen that I'll run straight through after I add half a gallon of diesel to it, see what that does.

For what it's worth, while I put 35k on this with a veggie blend my commute was a long one - 45 miles each way. The commute, however, changed to only 12 miles each way, and that's when I started having trouble, and I suspect that the short trips caused some gunking.

__________________
1983 300SD, Silver/Blue, 230+K (rebuilt at 196K)