Did you ever get this sorted ? Got a 55 plate Vivaro with similar problems - wont rev above 2500 rpm, starts and runs ok but no power. Changed EGR valve, boost solenoid and boost pressure sensor and tried it with a known good MAF sensor all made no difference. This happened without any warning van was ok one day then no power the next.
Had it on garage computer and only fault that came up was EGR which is brand new.
Just wondering if the turbo is seized or something as I heard a whistling noise just as I was loosing power ( whistling noise seems to have gone with the power, in that I haven't heard it since ) Any way to check the turbo without removing it, as it's a barstuard of a job by the looks (back of engine), the waste gate seems to be moving freely.
Any help greatly appreciated cheers
Last edited by Steve E; 08-09-2011 at 11:30 AM.