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What is an engine control unit ( ECU ) or engine control module ( ECM )?

CONTROL ECM ECU engine module
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What is an engine control unit ( ECU ) or engine control module ( ECM )?

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The fuel injection system of your car or truck is controlled by a small unit called a engine control unit ( ECU ), it is also called many different things by different manufacures, ECM , PCM, FUEL COMPUTER ECT… Transmission Control Units are called TCM’s.

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