An engine control module (ECM) is an on board computer that keeps track of and constantly manages engine controls which includes timing and air / fuel mixture. So in fact a properly working engine control module is continuously. Conducting a “tune-up” to ensure peak efficiency.
As reported by the folks at motor age, in earlier times when engines used carburetors, mechanical fuel injection and adjustable distributors, engines needed adjustments, fine tuning of the timing, idle air/fuel mixture, choke adjustments and accelerator pump. These adjustments were needed at 15,000 mile intervals and for some models at 5,000 or 7,500 mile intervals. These cars didn’t have an ECM (Engine Control Module) or PCM (Powertrain Control Module). When these adjustments were made along with spark plugs and possibly other ignition component replacement then a tune-up had been performed. With modern engines these adjustments are made continuously. By the ECM or PCM yet the term “tune-up” is still used by many people.
The term “tune-up” for a modern vehicle refers to cleaning, adjusting or replacing different components such as engine air filter, cabin air filter, spark plugs, belts, parking brake and intake and exhaust valve adjustment just to mention a few. Our main concern when you bring your car in for a “tune-up” will be to check these items and any other items that may need adjustment or replacement do to wear and tear for the whole car. Also to meet or exceed any specifications as stated by Acura, Honda or Subaru Factory Scheduled Maintenance programs.