i think it doesnt require mantenance.. i too also want to change or do soemthing with the coils
i mean i change out the filters, oil, fuel filter, spark plugs etc... but nothing for the coil pack
You can test the coil packs before changing them, i'd do that first. Chances are you dont need new ones, they dont often go bad - they are not a normal replacement item like spark plug wires etc.