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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Engine Controls - Theory & Operation - 3.3L Gasoline) >> Computerized Engine Controls >> Input Devices >> Throttle Position Sensor (TPS)

Throttle Position Sensor (TPS)

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.

TPS is mounted on throttle body and monitors opening angle of throttle blade. TPS will vary output voltage, approximately 1-5 volts, according to angle of throttle blade opening. PCM uses this information and other sensor inputs to determine engine operation. In response, PCM will adjust fuel injection pulse width and ignition timing.

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