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Introduction 3 Reasons to have your Engine Tuned, Tuning an engine is a technique for changing the combustion process. Modern cars all have engine control units that can be reprogrammed with simple performance chips, but previous vehicles required tuning by replacing and updating performance equipment.  That is, if your car was made in the 1980s or later, tuning the engine won’t take too much time and work.  Power output, fuel efficiency, and engine durability are […]