[cidair]

My 550 started to act strange this weekend. No, or very little, boost pressure = very low power and torque! Engine runs smooth, revs all the way to redlineand otherwise acts normal. Check Control says " DRIVETRAIN " not full power available, drive careful, contact BMW Service partner.

Ok, so I contacted my BMW service partner and they found some fault messages in the car memory; loss of boost pressure, boost pressure sensor failure#2, possible defect on wastegate#2, vacuum hose for wastegate faulty.......... there was also a comment on checking that there was a yellow vacuum hose. Yellow? Is this someting that should have been changed on my car?

My first thought was the Hartge ECU, but I recieved a new one that I changed.
No diffrence.

Anyone else had this problem?