Sorry for the late reply Ian, Been busy with work and have done nothing to the car recently except clean it today for the first time
That's a good call on the MAP sensor and makes sense. It's wired in but to a VVTi body loom so I expect there's some missing wires there. I'll be ditching it as the stock one is next to useless anyway, I'll fit a decent aftermarket boost gauge once the car is running. However your point about the poor running is interesting, there's nothing so far I can find that should cause it to so massively over-fuel, to the point it is barely running on 3-4 cylinders.
After seeing your video I'm also concerned about the timing belt tensioner, it was my main reason for posting the vid. It's a higher mileage engine (though serviced through it's life by Toyota until recently) so I wouldn't be surprised if it was near end of life.
The engine issue is not the priority for now anyway, it's clear I'm not going to be able to get the auto box working in this shell so it's back to plan A and convert it to manual. I bloody hate all that auto ECU trickery stuff anyway, manual is far simpler and it's just mechanical things going on which my brain can better understand Next step is going to be a trip to Dr.Jekyll to pick up my manual box, flywheel and clutch.
I also still need to find a manual clutch pedal, clutch master and manual accelerator pedal, the rest of the items are pretty simple to source.
No doubt Where are you in Northampton Kevin?