The thing is that it is meant to be complete. Just the back half of the car cutoff!. With regard to the MAF sensor, yes we learnt that one the hard way had it off and wouldn't go at all. so I said put it all back and it went, an ah ha.... moment!! Alos noted that if unmount the igniters it wont go. They have to have their bodies earthed.
Where are the O2 sensors located and I can check they are still plugged in.
thanks