Hey All. I have a no boost issue with my 2010 JCW R56. I have smoke checked the entire system and everything is tight. I have replaced my DV and my Wastegate Boost Solenoid. I still do not have any boost. I am looking for other things I need to check that could be the cause of no boost. My turbo spins freely and does go up to 4psi at WOT. Normal driving the boost sits at -3 to -11PSI. There are no codes and aside from not having any boost, the car drives perfectly. I am at a complete loss, thinking it could be my wastegate?? Any advice is hugely appreciated.

Thanx!!

 

With a scan tool, check the duty cycle for the diverter valve, wastegate and the fuel control valve. These should indicate where the issue is. You might not be throwing a code, but multiple sensors will prevent boost if they are not in the correct range.
You might also want to check and verify that the vacuum pump is operating and that the vacuum solenoid is functioning properly and that the vacuum lines are tight.
Put a vacuum pump on the waste gate vacuum can and observe if the rod moves and the can holds pressure.
Just went through all this. DV was bad and I could not get the HPFP codes to clear except when hot. replaced both and now all is good.
You can also pull the O2 sensor and use a fiber optic camera to look at the gate sealing.
Good luck.