The "dolts at the factory" (I resemble that remark) chose to use a shielded coaxial wire to run between the ignition module and the coil. I think you cut the ignition harness while replacing the fuel injection harness. If you splice that white coaxial wire, just use the center conductor and tape the shielding strands back and out of the way so they don't get into trouble. It is there to minimize radio interference from the ignition system.