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E92 335i 2007 Coupe Boost Control Solenoids

Posted: 13 Aug 2017, 10:59
by fergusond
error codes have directed me to a fault on the 'boost control solenoids', which control the turbo waste-gates, took them both off to test, connected voltage and both solenoids click or energize, however you can blow or suck through the ports regardless whether the solenoids are energized or not.

I would have thought the solenoid ports should be closed until energized, as the waste-gate are normally open until closed via vacuum (ie solenoid power to open) to the waste-gate actuators.

Has anyone experience of these solenoids.

cheers

david

Re: E92 335i 2007 Coupe Boost Control Solenoids

Posted: 13 Aug 2017, 12:27
by M60NJP
Beyond my knowledge, but they could be butterfly valves so are open at both 'ends' of their play?