Well, I checked the ECU to the Dist. Harness. I also checked it on the right side wall (the 4 harnesses that connect from the Engine block to the firewall. And all I found was nothing. There are two wires that come out from the Distributor that connect to the driver's side and goes through that side I haven't checked yet. The first is a thicker Black/Yellow and the second is a straight blue wire. According to your diagram the Blue wire isn't even there. The Black/Yellow Wire goes from the Distributor to the ignition (I'm assuming) and also to the Main Relay (and upshift indicator light etc.). It's interesting to see that from the diagram, the black/yellow wire doesn't come from harness in the distributor. So now I'm completely going nuts trying to figure out what it is. FYI I do have a P30, VX engine harness, using the old harness from the DX under the dash. Swapped Main relay and coil and distributor should be fine since it ran before.