I found another forum for the F450 V-10s and they are complaining of the exact thing we are here. One of them posted a procedure to re-calibrate the pedal to the TPS and servo - which is normally used if either the TPS on the pedal or the servo motor on the TBI is replaced:
Quote:
Ford Electronic throttle pedal recalibration
The procedure:
- Turn your key to the ON position (not just ACC), wait for the various dash warning lights to go out - but do NOT start the engine.
- Press your throttle all the way down in one smooth motion - just do it at a normal speed (take about 2-3 seconds to hit bottom).
- Let it up, as soon as you hit the bottom.
- Turn off your ignition and wait 3-4 seconds.
- Start the engine up normally and drive.
May have to repeat 3 times for the Computer Training to complete.
This procedure trains the throttle position sensor to the throttle body servo motor.
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Unfortunately, the ECM quickly relearns and begins dampening your throttle response again. I just tried it in mine and it worked like a charm for about 5 minutes! You would not believe how crisp the throttle was, it felt like a completely different truck TONS of bottom end, roasted the tires like I power braked it - almost as if there was a real cable between my mashpad and the throttle body. Too bad it only lasted a few minutes
We definitely need to get SCT and Spartan involved to find out if they can change any of the parameters in the TBI dampening.