ECM or Engine Control Module is the primary computer in an automobile that controls the internal combustion engine. It also communicates with other secondary computer modules. An ECU or Electronic/Engine
Control Unit is the computer that controls the ignition and fuel injection systems. ECC or Engine Control Computer is a digital computer in control of the engine system. These three components control many
important aspects of your engine. Things such as fuel delivery, timing, as well as various other systems. These three systems working together help achieve proper and efficient engine operation so your
car can reach peak performance.
There are various items you can purchase to fine tune these systems however some automobiles won't allow these mods and the entire ECU must be replaced. Completely replacing the entire ECU
can help your car acheive even better performance. You can control many technical aspects of the engine to acheive max performance.