Boost drops after a few pulls

avi 335 n54

New Member
Jun 30, 2025
1
0
0
Hello everyone, I have a problem with my car and I'm hoping someone has an idea what it could be...
The car is 335 2007 mhd stage 1.
On the first few accelerations, the vehicle is 13.5 psi and suddenly after a few good accelerations, the boost drops to around 5 psi. If I turn the vehicle off and start it again...it gives a few good accelerations again and then it happens again. When this happens, when this happens, fault 30ff shadow is Shown.

there are no boost leaks.

I hope someone has some direction for me... Thank you very much.
 

ktb_e92

Specialist
Apr 16, 2024
75
37
0
Indiana
Ride
2007 335i MT6
Based on what you described, I'd start by replacing both boost solenoids and seeing if that fixes the issue