Hi all, I am getting check engine light on my 2000 175 FICHT, and codes are 81, 82 etc, all 6 coil packs, it is saying not working properly, I am sure all 6 did not go bad at once, I read on another forum possible ecu/emm replacement, anything else to check first before I go this route, I do have a spare engine, but it does not have a ecu/emm on it.