N55 pulsing sound from engine

8900120d

Lurker
Apr 5, 2018
22
1
0
Ride
335i
e92 335i 2011 n55, it’s FBO I changed the valve cover gasket and the plugs, I also flashed mhd stage 2+ and reset all adaptations, now it’s making a pulsing/humming sound on idle.

See video (listen carfully to the pulsing deep hum in the background)