Ignition Systems and Starting Performance of United States Vehicles - A 13,954 Gar Survey 640104
This survey of ignition systems and starting performance was conducted in 400 communities in the United States and Canada. Results showed poor maintenance by the average motorist. Over a third of all vehicles tested had ignition systems with low output and 60% needed spark plug service or replacement. Approximately one-fourth of all motorists reported hard starting. Only 60% intended to have a tune-up; only 40% actually had it. Tune-ups usually consisted only of spark plug servicing.
This survey indicates rather conclusively the great need to make motorists aware of the value of periodic maintenance.