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Showing results for tags '1980 cadillac esd'.
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Does anyone know anything about spark plug decoders? Or the ESM... little black box wired to the distributor? Apparently California manufactured caddy's were the only ones with this! My caddy won't start and when I unplug this box, the car will start but idles high and stays there! Is there a way to remove or bypass this ECM/ESM? Please help!