Can anyone help with this....I have a 93 Aristo TT...only had it for a few weeks and am glad I got it....however, I fitted a speedo converter chip which was also suppose to derestrict the motor as well.....it did'nt derestrict it and the clock is showing 18mph slow. Have heard that if the power is removed from the ECU the memory is wiped...and they have to re learn....would this help with the derestriction issue?