Slowpoke, your profile says you have a Branson. I知 curious if that has one of the Cummins clones in it? Does it use a grid heater instead of glow plugs?
If the Branson dealer had been better, I probably would have bought one.
Cummins engines in Dodge pickups are known to start when cold better than the powerstrokes and duramaxes. I believe a lot of that is due to the higher compression ratio of the Cummins. Glow plug diesels seem to have a harder time when it痴 cold. My Cummins has started at -15F without plugging anything in. Lots of guys will remove the grid heater altogether and they will still start down to about 0*F.
In comparison, a friend has a 6.0 power stroke, and when the glow plug harness wasn稚 plugged back in after a repair, it would barely start at 25*F. It finally started after about 5 minutes of cranking and made a huge cloud of white smoke when it did fire off. Reseated the connector, and it fired right up when cold.