The reincarnated Skittles truck ran perfect last night. I put yet another new esc in it, another mamba max pro. I also put in another new receiver. I put the wire in an antenna tube and shoe goo'd it to the chassis as suggested. I braided the wires from the esc to the motor as suggested. I re-routed all the wires to try to avoid interference.

I also changed the shock fluids to 30 in front, 40 in the rear with zero rebound in all four. I managed to win both heats, tq, and I won the main by about three laps over second place.

Anyway, thanks for all of the tips. I'm not sure what exactly was the problem but I'm pretty sure it is solved.