Parts & Accessories Spare parts Services: (Engine Computer Programming) ECM TCM - Speed limiter removal 80 - Cut off (misfire or electric cut) 90 - Rollin (downhill) 80 - Idle adjustment (engine pressure) 60 - Throttle adjustment (increased pedal response) 100 - Backfire (shooting) 140 - Popcorn (popping) 140 - Cooling fan speed adjustment 80 - Cylinder deactivation system cancellation 80 - Environment system cancellation (exhaust sensors) 70