N54 pressure converters

[Kish2604]

Hi guys, I been getting a 30fe over-boost code together with a half engine light, this happens at low to mid power range when trying to accelerate a little faster, it is not tune dependent as it is happening with or without my tune on. The car will start to surge back and forth like and then up comes the code. After a lot of reading it seems that the likely culprit for this one is the turbo pressure controllers or sticky wastegates, I will have the waste gates inspected today so the only other culprit is the vacuum based pressure controllers. Does anyone know where I can get a set from other than the stealers?

Have already replaced coils, plugs, engine fluids service, fuel system cleaner, no other codes other than the 30FE...

:thumbs:

 

[hoosain]

let us know the outcome

 

[Prev]

Sorry bro, hope you get it sorted soon :thumbs:

 

[Kish2604]

let us know the outcome

Will do after I crack this one...

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Sorry bro, hope you get it sorted soon :thumbs:

Ta Prev!

So bit of an update, put the car on a ramp today and took the bottom covers off and had a look at the downpipes and the Vclamps attaching them, they both clear each other well and the wastegates actuators feel good with proper travel and spring return. The vacuum pipe going to the rear actuator looked a bit ratty so that was changed out on the rear turbo, the front turbo has no access unless you strip the front comprehensively...

All this surging started after the downpipes went in, problem first manifested itself that nite while logging...I know the tune is not at fault cos it still does it with the tune turned off...

 

[S1NGH 001]

Sorry to hear Kish, hope it's nothing major :thumbs:

 

[George Smooth]

Gave this some thought. The waist gates remain closed when there is vacuum so vacuum is not your issue. The solenoids between the vacuum canisters and waists gates are messing you around. Number 4.

 

[Peejay]

Hope you get it sorted soon. :thumbs: