ok i tried to start my sled the other day and it took her a little to get going (-37) and forgot to plug her in, well she fired and then shut off, now she wants to start but she back fires really bad ( big big flames blowing out the exhaust) so i just dont know what to do its like theres two much fuel some where or something, should i pull the plugs?? if so what kind of plug should i go with?? just need help anything any ideas i mean anything, its my first one soooo ive been really happy with it now this....