Adjusting the throttle position (TP or TPS) sensor on your Jeep Wrangler should only be done if the Jeep is running rough or starting hard and you suspect the sensor has been moved, or you are replacing the sensor with a new one. The sensor works on a system of input and output voltages that tell the Jeep’s computer where the throttle blades are at all times. An improperly adjusted TPS will cause the Jeep to run poorly because the computer cannot properly compensate for the air and fuel being fed into the engine.
Turn the ignition switch in the Jeep to the “On” position but do not start the engine. Locate the connector on the back of the throttle position sensor but do not unplug it.