I've got a 99 saturn sl2 that I've rebuilt the engine and have reinstalled in the vehicle. For some strange reason I can't get spark from the plugs. It has power running to the coils, but when I turn the car over its not fire ring the plugs. All of my electrical connections seem to be correct. I had to redo my timing because initaly I had it backwards, seems spot on now. And when it cranks the tack moves with the engine rotations. Could this be an ecu issue? Any help or advice would be amazing.

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so many things can go wrong, but often guys will break wires or sensors or have loose connections. So try that, and this video d