Our cars are 23 years old and are not like the points and condenser musclecars of the 60-70's and have different tuning needs than older muscle cars. It is a tool that will tell you the state of your sensors (O2, TPS....) and will be invaluable when, not if, you have a problem. Think of it as a Craftsman 263 tool set made for Turbo Buicks .....and costs about the same too!!! It is necessary for the proper tuning of our cars.