I have a 02 Cummins diesel. I live in Ontario in the winter when its below freezing my truck starts great, but no power till it gets warm. Pedel to the floor for first 15 mins I can't beat 10mph. Then once it gets warm runs like a top. But absoltley no power til warm. In the summer when warm out can start and go and runs like a top. This truck has been like this for 170,000 km. But only have the porblem when cold outside.

 

Next chance you get, toss some #1 fuel in her, and that should fix you up!!! Also, wouldn't hurt to change out the fuel filter.

BTW, welcome to Diesel Bombers!!

Also, add a Cetane Booster and a fuel lubricant. #1 fuel is "dry" compared to #2 fuel.

 

Ok... A few things to check over...

1. Do you have any error codes???
OBD II Error Codes

Error Code listing...
http://mopar.mopar1973man.com/pdf/error-codes.pdf

2. Do you have enough fuel pressure?
Lift Pump Diagnostics



Fuel Pressure gauge is a MUST on all VP44 injection pumped trucks...

 

Yeah, I had the same problem last week... I was driving home from TX and didn't bother to grab any additives....it was 71F (20C) when I left, and less than 36hrs later I was in -10F (-25C) weather in Wyoming and even while driving on the highway it was too much for it...truck died on me...Just use some Howes or a similar winter additive in your tank and you'll be fine. After I ran the Howes I haven't had a single problem since, and the temp has been hovering around -20C here for the whole week and my truck has been sitting most of the time but she ran like a dream last night after I got it started and let it run for 20minutes. Also, you might want to look into getting a winterfront for your truck...they're ugly, but they'll keep the engine nice and toasty and help prevent poor performance and all that cold fuel crap.