I have a NS8 B 1990 with no spark one side. If one side has spark and the other dosn, t what should I replace. I moved the spark plugs from the bad side to the good and know its not the plug. Would you replace the plug wire on the bad side next?
You would use the factory service manual to get the values and test procedures so that you do not spend money replacing good parts. Otherwise, is's just a guess as to what is wrong.