Multiecuscan

Hi all, back on again after a few years of trouble free fiat motoring. I have a 2011 ducato 2.3jtd, model 250 motorhome that I have just replaced the fuel filte on and after the first start it ran ok but the filter leaked at the screw top so I tightened it more and cured the leak but when I started the van again it won't rev above 3,000 rpm. There are no fault codes displayed. I have multiecuscan version3.5 registered and can connect to the ecu ok and access all the facilities of the software but am not sure how to use what's there. Any guidance will be much appreviated
lrbob