Finally got around to doing the work I was putting off and while I didn't replace the vacuum lines I did get everything else finished.
And I still get the reduced power warning ... it only happens when pushing the truck up to 80+ in 4th gear.
I'm going to get some high-temp vacuum line, catch can and JB4 next to install.
My idea is that with the JB4 I just reset the warning when it happens so I don't need to cycle the truck off and on ...
Outside of a possible turbo issue I'm not sure what causes mine.
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2012 X5M - M5 S63TU Turbos/Manifolds, Custom Exhaust, Intake, JB4/BCM, OEM race stripes
1999 323 - M3 Clone - Hardtop - S50 Cams, S52, 3.23 LSD, Koni Sport, 18' E46 M3 Wheels
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