Today's automobiles do not require tune ups in the same way as older vehicles. Automobile manufacturers have set forth, in their recommended maintenance schedules, intervals for replacing spark plugs, PCV valves, fuel filters etc., while recommending that other items related to engine operation be inspected for proper operation and/or adjustment, such as ignition timing, idle speed and other emission control related devices.

Therefore, the term "tune up" indicates the need for routine maintenance and should not be associated with poor performance. If your vehicle experiences any operation or performance problems between maintenance intervals, that specific problem should be addressed by performing an engine analysis to isolate that particular problem.