Quote Originally Posted by johntremell View Post
the LT b1 stays at 16.4 when im idling, but when im driving around it fluctuates up and down. the BBV is tightened down, its the black part that dosent stay seated. how do I get it to stay seated?
Yup, you have a vacuum leak. If you are all sealed up it should fluctuate between -3 to +3 and mainly sit a 0. Time to break out the carb cleaner.