BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Diverter valve won't lock

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      06-20-2013, 03:26 PM   #1
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Diverter valve won't lock


I recently started upping boost for summer, noticed I could not boost over 14psi and my throttle lifts would cause 20 psi "releases". Checking under the hood I noticed the diverter valve closest to the throttle body was a little loose, it does not lock in place into the plastic tap that you turn to unlock it. I'm assuming this would cause over-boost on throttle lifts and under-boost and 99 waste-gate DCunder full load @ 14psi. Can that little tab be replaced is there a seal that fell out?

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