Hey guys,
So when i am driving my car when it is warmed up my vacuum/boost gauge bounces =/- 2-3 vacuum in both directions. This only happens when the coolant is at like 140+ so maybe something is warming up and loosening or maybe some more car procedures get turned on as the car begins to reach operating temp? It also happens when im in boost too... I had vince fix my bogging issue but he said this vacuum problem isnt tune related. I had problems with my timing and VVT about a year ago and got that fixed. No more check engine lights from the timing and VVT but still have the same vacuum problem. Need all the help i can get, thanks!

 

I don't know