Motor dies after startup.

I should add that while I'm testing it and the engine is warm I can do idle and throttle with no problems. But once the motor cools down and sits, say, overnight, the moment I start it in the morning it starts having a really rough idle and then shakes more than usual. This morning startup was a little rough but power was OK... on the way home I was severely lacking torque and power. and the shaking was really bad, plus the smoking.

Maybe you guys are right, when the motor gets cold the gumming up gets worse and thicker.