![]() If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. ![]() But when your battery goes dead or you disconnect it to work on your vehicle, the PCM “forgets” the adapated home position. If the buildup occurs gradually, the PCM “learns” the new home position. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. Starting in early 2000’s, many car makers including Ford started installing fly by wire electronic throttle bodies. If you’ve replaced your Ford electronic throttle body or you’ve disconnected the battery, you must do a Ford throttle body relearn to establish a new baseline idle. Make and Model > Ford, Lincoln, Mercury > Aviator > Ford throttle body relearn procedure Ford throttle body relearn procedure How to do a Ford throttle body relearn procedure
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