I have the same problem no one knows a answer yet , 1997 Land Rover discovery 4.0 , disco starts 1st time runs great then all at once it looses the coil trigger signal to 2 coils , then is running on 4 cylinders and running like crap , new crank sensor new ecm same as all ways coil trigger goes away

1997 4.0 Disco I loose the coil trigger output on 2 coils , I am thinking bad ecm also , starts up runs great then the 2 trigger signal s go away , this is the Gems also , I got a ecm from eBay same problem , do I need to have the ECM flashed, ? Please help if you can