So in summary, there is no spark at all in the #4 cylinder, and it isn't because of the ign coil or spark plug (and the connector also looks fine as well). I haven't had a chance to do a continuity test yet, but can anyone think of anything else that could be causing it besides the wiring or the ECU. we also went all around the motor trying to make sure all the grounds were well grounded, but they all look good.