1. turn key to on position
2. set parking brake
3. turn key off
4. disconnect both negative battery cables. (min of 30 mins, the longer the better)
5. reconnect battery cables
6. turn key to on position
7. slowly slowly press accelerator pedal all the way to floor and then slowly return to top position
8. release parking brake and turn key off.
before i did this all i could get out of a tank of gas was 410 - 420 miles. since i have done this i get 500 miles to the tank. i read on one thread that some people see an improvement in gas mileage. i also noticed my truck to have a slightly quicker throttle response.
Its the gas pedal. These trucks are throttle by wire. The Apps sensor is like a potentiometer that provide readings to the ECM on "percentage of throttle" - basically how much you have pressed the pedal.
Resetting it, allows recalibration to the ECM. Most notice increased gas mileage....
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