Day 2 with the truck. CEL light on. P0302 Misfire cylinder 2. I can only guess with all the things it could be. I have another thread about air noise. Well I think that is the K&N POS there put on here.
Just venting for now.

 

After looking for the Vacuum line problem I also found a connection to what I believe is a freeze plug. The 2 wires coming off it are cut off. Don't know what that is either.

 

How about a block heater?

 

Thanks Dan I think your right. I have never had one so I didn't know. But that really makes sense. I Do have a diesel and I live in Colorado and never put one on my Jetta.