Sorry Heinz our posts crossed.
So the switch passes current when the brakes are not in use.
One side of the switch feeds from the throttle pedal, the other is to Earth.
If the switch fails,
A) it either interrupts the feed from the throttle, creating the same effect as using the brake pedal, or,
B) It doesn’t interrupt the circuit when you do press on the brake.
In my case, more throttle overcomes the problem.
In Heinz’s case, leaving a wire off the switch creates case A), so his car should not maintain power - but as reported, he’s got a power boost!
I now understand that your advice was that the ecu has learnt to interpret the BPS wrongly and so over-rides it most of the time. We should then disconnect the switch for a time, and the ecu will re-learn normal driving, rather than react wrongly to the BPS.
I take it that the wire can be restored eventually.
Hope I’ve got that right. I’ll drive with the wire off the BPS for a while. I think I’ll also try to find that Earth and clean it
Stuart, I've only just now seen your post. I'm not sure how the wires of the BPS run exactly. But in any case, the control unit plays a role. What it does exactly when it's working wrong or right, I don't know. I also do not know how many other variables, e.g. other sensors, also play a role. I only understood that for driving there should be no unintentional wrong intervention of the ECU. To avoid this I have prevented the ECU from working on this special job (among many others which the ECU has to manage further on) by keeping the BPS out of the way, so the circuit is always open.
