Re: timing problem maybe??
Mike.......When the light flashes once and then two quick flashes, that is a normal sequence that shows your ECM is working properly. It will flash this sequence three times followed by any trouble codes then close with the same sequence of flashes. Check your timing with a timing light......I believe it should be around 14 deg BTDC. Disconnect the spark advance plug near or above the AC unit before you check the timing and don't forget to reconnect it afterwards.
67 RS Camaro 327/ 350 Holley 650cfm > Edelbrock Performer Intake > Pertronix Ignition > Accel Super Stock Coil and Wires > Hedman Hedders > Hotchkis Performance Springs > 15" Rallys all around
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Camaro buds until the end!!!