[ronstoppable]

2017 BMW X3 35i sport with 97k miles on it. New to forums and new to MHD Forum - My X3 currently has Burger intake, burger intercooler upgrade -DV & GFB DV Upgrade MHD Stage 2 w/93 Octane gas & xHp transmission flash. I have been chasing a mid to high RPM WOT power surging issue. I have replaced boost controller, vacuum lines for turbo/boost controller, Used Fabian @PureBoost tuners to see if it was MHD issue and recently did the DV diverter valve with the GFB upgrade (not using the optional spring-done want to risk a code) and still having issues. I have added a link to my log from today. This car pulls hard but you can feel you head/neck surging as it seems power is being pulled out for some reason. I also have zero CIL or codes, which makes this difficult to diagnose. Would someone look at my log and give me a clue what to check now?? Thank you -
https://datazap.me/u/ronstoppable/af...S_SWvrzUxOnRJc

[Dekero]

My first thought would be a failing turbo... Especially if it's surging under throttle down acceleration...

[ronstoppable]

Originally Posted by Dekero

My first thought would be a failing turbo... Especially if it's surging under throttle down acceleration...

This only happens when under full WOT throttle... Almost like its pulling timing out due to pinging or another issue. Hopefully someone can look the log and spot something.