Weak Boost, Low power when accelerating

[Morganite1]

Code indicates pressure too low at high pressure side of throttle on my 2007 BMW 335i. No waste gate rattle. I'm thinking maybe collapsed vacuum hose preventing waste gate from closing properly preventing proper boost pressure behind throttle. Any comments would be well received.

[RocketSurgeon]

If you have the actual code number, that might help. I'm thinking boost leak on this one, maybe a cracked charge pipe or loose hose. If you want diagnostic software, I can give you anything you want from the android carly app to the dealership ISTA program.

[jclausen]

Check all those little vacuum hoses

[MysticRob]

Post #14 has some great info to follow:
http://www.e90post.com/forums/showthread.php?t=894084
I also replaced the hard lines going over the valve cover with 3.5mm hose too just in case they eventually developed problems.
Hardest part is getting in the small spaces to change out the hoses going from the boost solenoids to the wastegates, but take your time and you'll get it.

[mike@XPH]

Start by checking the charge pipe, stock CP is prone to failure