So you all are thinking a low voltage/amperage might be causing this misfire/flashing CEL. Thats kinda what i was thinking too. I have a 4ga wire from the batt. Directly running to the amp, and a 4ga wire running from the frame to the amp (cleaned the paint off and all that). But the factory ground for the truck looks to be a 6ga wire running to the engine block and thats about it. So i was also thinking about doing the 'big 3 update' as well as a cap. Perhaps a new batt may be needed as well.
Anyone know why the misfire didnt toss a code ?? I find this odd.