Throttle Position Sensor input
The throttle position sensor is mounted to the throttle butterfly shaft to measure its rotation. A TPS is common on many late model engines and the Haltech sensor should attach with little or no modification. The throttle shaft must protrude from the side of the throttle body. This may require the machining of the throttle body or the manufacture of a new throttle shaft. The inner mechanism of the sensor rotates with the shaft. If the shaft is round then file a flat surface on the shaft so that it will pass through the sensor assembly. The TPS should be mounted against the side of the throttle body, using two screws, such that the throttle shaft and the sensor mechanism can rotate freely. The absolute range of sensor movement is not important, as the sensor can be calibrated using the programming software. Your engine may have a Throttle position sensor already fitted and it is often possible to make use of this TPS. The Haltech supplied TPS has a resistance value ranging from 0 to 10kOhms . The resistance value of the installed TPS does not have to be the same since the ECU uses a throttle calibration function to determine the position of the throttle based on the signal received from the TPS.
Note: Make sure that the axis of rotation of the shaft is exactly aligned with the axis of rotation of the sensor, otherwise some binding may occur. Also, do not use the TPS as a throttle stop. In either case, the TPS will be damaged.
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