[starbuck]

Hi all, looking for some assistance

Car is FBO 2011 e92 335 Xdrive Auto with 50,000 kms
Car has an xhp stage 3 transmission tune

Just had a ps1, dv+, pure inlet, 3.5 bar tmap installed. Same shop is now dyno tuning the car.

The issue they seem to be running into is the car drops boost suddenly to 10psi at about 4000rpm after hitting about 17.5psi. Shop initially thought the car was hitting the tq limiter but the tcu tune raises the tq limit in each gear significantly to 737 ft lbs

The are now hunting for possible boost leak or an issue with the boost solenoid. I dont think it would be the boost solenoid because the car has been operating completely normal prior to this work.

Any thoughts or ideas on what it might be