Rolling road - BHP well down. Won't rev past 6000rpm.

[E46ACS]

Had my car on a Dyno today, only made 288bhp at the flywheel.

Car would not rev past 6000rpm. Took it out on the road, all fine, revs all the way round like it should. Put it back on the dyno, same again.

According to Dyno Dynamics, the car knows its on a rolling road so a soft limiter kicks in and prevents it going past 6000rpm. Apparantly I can get the dealer to put the car in 'dynamic' mode, and this will prevent this.

Anyone else had this? Or heard of this? Is this right?

Fortunatly I didn't pay for today as it was a friends place who is having a new website and wanted some photos of a proper car on the dyno!!!