truck wouldnt start

[popdad]

hi guys went out to start truck its cold here and it wouldnt start it was fine when i parked it no spark finnaly changed the mod and it fired right up first time that has happened had me wondering cause every thing was new only thing i changed was the coil put in a hotter one last week do you have to put in some different modual when you change coil or is stock ok or is it just a thing cause it was cold the mod was only less than ayear old just wandering if you guys had that happen or you would know if i had to buy a different mod thanks popdad