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Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Put 5 ecm's in car. Check engine light on. New lamp driver. Wiring and grounds good. No referrence volts from pin 21. Power to ecm.
Ecm acts dead.
Gary