Land Rover Repair: little spark on two cylinders, coil pack, little spark

Question
hello i have an 03 discovery i changed the spark plugs the wires the coils and still is barely running code says 5 and 8 are missing these two are a pair on a coil but i barely have any spark not very brite and sometimes not at all i cheacked all my wireing no wires are smashed or carroded i cleaned all my grounds im stumped please help!!!

Answer
If you are missing spark to two cylinders you have one of three problems:
1 - There is a failure in the coil pack or plug wires - fit new ones
2 - There is a problem with the wiring between the coil pack and the engine ECU - trace and fix
3 - The output stage in the ECU has failed  replace the ECU