Thanks a lot for the link it make interesting reading (not that I understood everything).

So it looks as if I have a level 8 ECU WD48.08 IAW048/01 but a loom suited to a level 6. Which if I understand it correctly means I need to adjust the wiring to the TPS.

In addition I basically don’t have all the part the ECU could drive so there are unused pins, air con pins 21,12, knock pins 22, 6 Octane pins 13, 14 and Canister Purge pin 7.

Is it possible that the TPS wiring could cause the fault? I did fit new phase, crank, ECT & ACT, AMAL and MAP sensors before I fitted the engine.

Thanks again for the responses it’s a big help.