So just replaced the header manifold gasket and reinstalled everything in which I also just replaced the fuel line from the fuel rail because I guess I played with it too much to now my current problem. ...

first time I started the car with the new fuel line I installed it started and the brand new serpentine belt spun everything... I shot it off because all of the leaky fuel I assume was making it smoke and I got an 02 sensor code pop up so I shut it. Ever since, i start it up and my pulleys arent spinning with the belt on. You take it off and they all seem fine. Help!

 

I would double check all the pulleys and also your belt routing. If you used degreaser that stuff is wicked slick and will cause the pulleys to not grab onto the belt. Dry everything off good and I bet it all works fine again. It would be worth it to pull apart and clean/dry out your wiring around the o2 sensor. Sounds like it got some water in it and thats what set the code.