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      02-02-2015, 05:14 AM   #1
MM-Performance
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Exclamation X6M E71 engine malfunction „reduced power” please help

Hello Guys,

Could you please advice me how to solve problem,
Car X6M E71 US 30kmiles milage. full stock car
During full acceleration on high rpm show message ":reduced power"

The Error 30FF, low pressure boost,

I replaced boost control valve selonoid, turbos set with wastegates from other car,
check leaking, check vaccum lines,DV valves,
and nothing, problem didn`t solve

Any suggestion? I made logs from ECU, and boost pressure (measured before throttle plate)
on bank 1 and bank 2 is ca. 10PSI (0.65-7bar) that means turbos, turbos control work good, value on both banks are near identical.

Thanks for any advice!
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      02-11-2015, 09:38 AM   #2
PinkCarnation
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Same issue!

We had all of the pumps replaced when the X6 started lurching and making awful noises, along with pretty much vibrating side to side.

As of yesterday, it did it again, and BMW's service department is claiming that two of the replacement pumps were bad too.
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