My 09 850 wont even pop. went to start it today and had alot of crank but no pop to turn it over. couldnt quite hear the fuel pump start though. The temp was right at 0 degrees F. couple weeks ago it was only running on one cylinder in cold weather. I added sea foam to the gas at the begining of winter, and it hasnt seamed to run right since. could it be a moisture problem?