[HydroStream6]

Hello,

Posting here as there's more traffic here than the E70 side. I emailed this to MHD as well for input, but have not heard back.

Been playing around with MHD on this 2012 N55 X5. New plugs and coils. New wastegate control solenoid. Boost leak tested. Wastegate checked, holds vacuum. Fresh 93 octane, standard 10% ethanol. Stage 1+ MHD OTS flash. No codes.

I'm battling this jerkiness that you can see in the boost curve. It's repeatable and it is severe enough where you can feel the vehicle accelerate and decelerate as it's happening. This looks like classic PID error to me, but I'm surprised I'd see this on an off the shelf tune.

Third gear log below.

Any ideas what else this could be?

Thank you,
Adam

https://datazap.me/u/adamemm/log-167...og=0&data=3-14

[HydroStream6]

Adding photo of log. The boost is very saw like. Looks like overshoot and poor PID correction, but I don't know why.