2011 E70 35D Strange sound when decelerating

[andrewwynn]

That is one of the craziest things I’ve ever heard. You need to use an app like FFT to figure out where the sound is coming from because it will measure not only in the sound pressure level but all the frequencies related. You can definitely figure out for example is it coming from the left or the right of the front or the back.

Also use the vibration app determine the exact frequency of those clicks you can also just use an app audacity To look at the way for him and measure the milliseconds between those clicks.

We can determine from the speed of the car where are the sound is coming from based on the revolution in the drivetrain.

Is it possible that some thing controlling the turbo wastegate or boost Is somehow clicking open and close.

Perseverance is going to pay I promise. It’s way too obvious in way to repeatable that we can’t find the problem