Riccardo,
Pleased to hear you have sorted your issue. I have read someone having success of more preferred shifting by setting TPS @ full throttle to 0.75v instead of 0.96v?? Some also increase throttle pressure with the cable setting. I tend to lean towards OEM recommendations. In Australia...
Applying 5v between VA (Not VC) and E2 and measuring voltage between VC (Not VA) and E2 @ full throttle with the TPS adjustable range slot approximately in the middle and with screws slightly loosened you should be able to then move the TPS to achieve 0.96v as per the manual.
The other test is...