i,m not familar with a pectal loom,is it just the engine bay area loom for all the sensors of the engine, going to the 3 connectors up at the bulkhead?if so you may need to do a conn check to ensure they are all going to the right pins in the conectors including the injectors and the phase sensor,and also the map sensor does not go through the connectors,this is a pin map i made for my own sapph 4x4 while rebuilding it,it may help as a rough guide to see if all is where it should be.
assuming thats all that was changed, the problem lies somwhere in there