loss of acceleration issue

Changed ECM and harness, cost $3543.04. First day back on the job, loss of acceleration. The issue I brought it in for was not solved, parts were changed, issue remained. I found the cause while waiting for service truck. The wire inches above the tps assembly was worn through at the steel bracket. Covered the wire, no more loss of acceleration. Truck City should be called Parts Changers of Gary IN.