Bosch Motronic 3.1 problem

[Cauf61]

Hello

I have a problem with my Motronic 3.1 system. Not on a Porsche but identical system. All seems to work fine ( cold start, hot start, revving in higher rpm's , driving,....) except one thing : I you apply fast throttle from idle the revs are like delayed. Just like there is not enough fuel for 0,5 seconds. On a carburettor system you would say the acceleration pump is not working.

Anybody suggestions where to start looking ?

I myself was thinking at a worn pedal sensor. They wear out most around the idle position.

Grts
Patrick