Recent content by Maximus_E85

Hi everyone, My E85 Z4 2.5i (M54B25) has a whistle/high-pitched noise that only occurs at around 1/6-1/4 throttle between roughly 2000-3000 rpm. Some observations: No check engine light.- (before and after replacing the intake boot) Engine idles smoothly. No noticeable loss of power. Noise...