I read in the haynes manual this the only way to access the memory is with a hand held diognostic dohicky ..what i was thinking is that with this new engine i am already replaceing all ( and i do mean all) of the sensors since im doing that if icould start with a clean pcm then everything should run great as if this was a new car is this possible & if so what do i need to so this and how is it done ?????....... any takers ??