Thats why its driving me crazy mate. I tried pulling a plug and earthing it while turning over and spark seems decent enough but I've heard you can damage coil packs by doing this so was reluctant to keep trying.

I checked the timing and it was marginally off, looked like it had been done by eye. I reset it correctly with proper tooling and it didnt effect things.

I was told all sensors were pulled off the dead engine and put into the replacement one but cant be 100% positive, but i've gotten a couple more from a breakers yard and none of them have changed things while all giving acceptable resistance readings.

I've taken off all earths and cleaned them up, checked all fuses, separated all plugs and connections and remade them incase of any corrosion build up.