Found the answer:-
TD27Ti, under the passenger floor.
ZD30DDTi, centre console below heater panel, remove much of centre console to access.
My mistake was I thought all the Mavericks were 2.7s this one must be a 3.0!
Having finally got there I checked supplies and earths to find a missing earth on 3 pins of the ECU. Traced this back out to the common earth point on the inlet manifold where a wire had dropped off. Unfortunately it was pushed down right behind the main loom so I did not see it on my basic checks in the area.
The problem is I was not the first to see the car. When I got to it the intercooler was off and all the injectors had been cracked off at the unions. I find it hard to imagine the wire would have relaxed to where it was naturally, I'm sure clumsy hands pushed it there, oh well!