I cut into it at the coil signal input. Man, it was REALLY bad. I'm floored that a car can run at all with wiring like that!
I don't want to disturb the Throttle Actuator wiring unless it's needed. I have a good feeling that the harness will resolve my issues. I'll report back.
JetForeman, I'm glad to hear that your problem is solved! Congrats.
Experience is something you don't get until just after you need it.