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Chevy Silverado

How do you test the ECM system on a 4.3 liter engine?


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2015-07-16 18:17:17
2015-07-16 18:17:17

Yu must have a OBD-II reader

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ecm connect with vehicles engine not a electric system

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Reprogramming or updating the programming of an ECM.

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ECM stands for engine control module / COMPUTER

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I believe that has the DIS, distributerless ignition system, if so there is no timing adjustment. The timing is controlled by the ignition module, crankshaft sensor and the ECM (engine computer). Try having some run a test using and OSB tester. Sometimes if the sensor is going bad it will show.

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The engine speed sensor provides the ECM with a crankshaft position signal. The ECM uses the signal to determine a crankshaft reference point (Top Dead Center) and calculate engine speed (RPM.) The signal is also used by the On-Board Diagnostic system for misfire detection. The ignition system will not operate if the ECM does not receive an engine speed sensor input.


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