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1978L48jafo
Guest
I have a no spark condition with a HEI coil that is vibrating when the key is turned on. I suspect the module or ECM does anyone know a way to prove? Manual lists something specialized from GM to test. Note I repleace the stock with a HEI rebuild kit a few years back a company called performex???? any suggestions would be appreciated it started fine all winter long and then has issues come spring :bash
Thanks
John
Thanks
John