Why did I replace all spark plugs in my car?
Why did I replace all spark plugs in my car? My car was showing a misfire in 5 so i replaced all spark plugs it was still showing so i did the coil packs and then did fuel injectors when it was still showing now 1 is misfiring it has a rough idle and when stopped feels almost like it is going to die and has somewhat of a rough take off what else could it be? My car has 123900 miles. Can a cyclinder spark plug be replaced before purchase? 1) Coil replaced: no change Should have Ohmed out...