i have a 2007 dodge with the 5.9 in it. Its a six speed and i have a superchips, exhaust and intake. My only problem is when i cruise at anything over 80mph it will surge like i am letting on and off of the throttle. Any ideas? Another issue i have is under full throttle my boost used to hit 45psi and hold it. Just recently it started bouncing between 35 and 40psi and wont go any higher but also wont hold a steady boost at high psi.