I don't recall for sure but I think those had replaceable extensions from the coil to the plug. Also inspect all vacuum hoses for air leaks it will cause random issues. as for a scanner some will but they are mostly the real costly ones that a shop will have and you will have to pay a hr shop time for them to scan it. If it were mine I would start by making sure all maintenance items are 100% first (coil on plug boots, plugs, vac hoses,and air and fuel filter)