Help please, I am only getting 8.4 psi boost from my f12x. I have changed plugs (new irridium), macsboost chip, new waste gate solenoid, replaced 3 boost hoses to wastegate solenoid and actuator. Havnt touched the small pill one. New drive shaft and seal but that is irrelevant. Turbo spins free, actuator clean and tight but moves. Reaches 5500rpm and 94kmh in the water. What am I missing??????