Marius

After having my 225 machine washed for the first time (in a year), I did a few two-second stabs of gentle left foot braking (to clean detergent and wax off the brakes) while accelerating away. To my amazement, braking seemed to have a direct input on the throttle! Even if I pushed the throttle pedal "to the metal" simultaneously with going on the brakes, already being at around 4-5000 rpm in 1st and 2nd, I'm pretty shure that engine power was substantially reduced immediately (I'm well aware that the brakes are very much stronger than the engine, even in 1st gear).

The REALLY weird part is that after releasing the brakes, the engine each time needed a couple of seconds to come back to full power (for that rpm figure), even if revs never dropped below 3500 and the turbo hadn't had much time to spool down. It felt as if not only boost pressure had been bled off, this was like almost closed throttle valve! Power would come back very smoothly during those couple of seconds after releasing the brakes, and there was no stuttering/misfiring or sign of an intermittent electrical fault

It's hard to believe I could have driven the car for a year without noticing this before. Any advise or explanations?

Marius

It's programmed to behave like that! No left foot braking in TT's! And more: if you try to upshift without going off the throttle during full acceleration, the ECU will automatically close the throttle valve and bleed off the boost, making your acceleration slower than if you do it the proper way.