Cylinders 1 3 and 5 are misfiring. My mechanic says that I need to change the fuel injectors but the car is running fine with just a hint of rough idle. Cylinder one is misfiring more than 3 and 5. The check engine light is on.If the injector is weak on number one can it cause the injectors on 3 and 5 to malfunction ??. All of the coils and spark plugs are good.Checked the X3 pins and they are fine.