06 F250 PSD 22,900 miles. I have been noticing recently that it has been blowing a good amount of white/blue smoke from time to time. This morning the tach is all screwed up and showed the truck idling at 1100 rpms but was really idling fine. When driving it says it shifting at the 3k mark but really isn't. Thoughts?

 

You are covered by warranty - take it in and get it fixed.