was +2 degrees here this morning. my 85 300TDT had been plugged in since about 11pm. i tried starting it this morning, and after the starter decided it wanted to engage, it fired right up and idled smoothly. i let it "warm up" for about 15 minutes to get the interior warm so my daughter wouldn't freeze on the way to school. unfortunately the trip to school wasn't smooth sailing. low power, stumbling up hills, felt like there might be gelled fuel or perhaps frozen water in the tank? i let it idle in park w/e-brake on in the parking lot while i was dropping her off, about 5 minutes, and the trip back home was like normal again. subsequent trips today in the 15-20 degree temps have all been fine.