alright ive been hunting down a vacumn leak its a small leak to small to throw a code but big enough to make my LTFT 16.4 at idle i have yet to take cab cleaner to the vacumn lines to find the leak i just did a visual inspection everything looks good except the BBV this looks to be a problem





how do i check if its the BBV its self?

the car is a 99 L67 with 176k miles on it and im only making 5psi of boost