Electronic Fuel Injection System - EFI Basics
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Another excellent sensor that can actually help save your engine is a knock sensor. It signals the ECM when the engine begins to suffer from detonation and can pull timing back to prevent engine damage. For example, the FAST XFI system offers electronic spark control (ESC) that is tunable not only for how much timing is retarded, but also how quickly the reduction comes in as well as the decay rate of the retard. View Related Article
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