Yesterday morning, and today when I tried to start my truck I got it started, but it idled rough, real rough like it had a few misses. It also blew smoke, kinda white, kinda blue, not real sure. Yesderday it ran normal after a few minutes, but today it died and didn't want to start back up. It's been colder these past few mornings. I got a new 350, stock ignition and carb, but it's not excactly tuned (carb is tempermental).