VZ misfire odd bank but prestenting with no codes on Scan Tool

[Maui8515]

Hi guy my self and My uncle have been at this car for a while the engine has done 160k and replaced engine that has done 180k.both engines start but misfire on 1 3 and 5 and runs real rough and unable to drive. We've just about exhausted every option and are at a loss to what may be causing the issue.

here is a list from start to finish of what we've done.

no codes found on scan tool
Checked timing chain. It was all good
brought new coil pack and injectors
brought new fuel pump and filter and installed
Bought second hand engine and installed it still exact same issue
Replaced Ecu bcm and pim with second hand one still no joy
checked there is power to all the coils.
ENJ/EGN Fuses all good


We're currently thinking maybe the crank sensor or cam sensors may need replacing but this would mean both engines would have to had the same issue which is unlikely but still think it could be the cause. in any case we are just about out of ideas if any one could throw us some more ideas would be much appreciated.

 

[Maui8515]

I should also add that the engine control Relay runs real hot to the point were it has left a burn mark on the top exterior i have since replaced it with another relay but still gets overly hot.

 

[Fu Manchu]

Have a squizz
Easy and free fix for vz v6 engine miss (faulty ECU)