hi, my vr6 seems to be slightly jerky or hesitating if you hold it steady at around 1400 -1600 revs, any more revs and its fine pulls well, there are some dodgey wires going to the hall sensor infact one of them isnt connected, gettn that sorted next week as its booked in,i just replaced the plugs and HT leads, the plugs were abit sooted up aswell,going to clean the MAF sensor and change the air filter as thats seen better days, anything else i can do before i seak profesional help?