1999 840 Auto
Fitted:
LSD 3.91 diff from E34 M5.
Custom exhaust with 100-cell fast-flow cats
Stock engine (M62) and Auto-box.
Problem:
When in Sport Mode and under full acceleration (accelerator pedal to the floor) the final gear change to top gear is faltering as the revs hit the limiter-level which causes a miss-fire right when the gearbox is trying to change gear.
Anyone know what I can do about this? I have looked (without success) to find someone who can remap the ECU and Transmission Control Unit together.