Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1992CAPRICE WAGON RWD V6-262 4.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORADJUSTMENTS
1992 Chevrolet Caprice Wagon RWD V6-262 4.3L
Throttle Position Sensor: Adjustments
1992 Chevrolet Caprice Wagon RWD V6-262 4.3LSECTION Adjustments
The TPS is not adjustable. The reading should be be checked only when the TPS sensor or throttle body has been replaced, idle speed has been adjusted, or if a trouble codes exist. To check the TPS reading connect a digital volt ohmmeter to the dark blue and black wires of the TPS connector, or install a "Scan" tool. Take reading with key "ON" engine "OFF."
Check TPS only after the idle speed has been adjusted, or throttle body parts have been replaced.
1. Disconnect TPS connector and connect jumpers between the harness connector and the TPS sensor. Connect a suitable digital voltmeter to the dark blue and black wires in the TPS connector, or set the "Scan" tool to measure the TPS output voltage.
2. Turn ignition switch to the "ON" position, but do not start the engine. See TPS voltage reading under Powertrain Management/Computers and Control Systems/Throttle Position Sensor/Specifications/Electrical.
3. If voltage reading is satisfactory, remove the voltmeter or "Scan" tool and jumper leads. Reconnect the TPS connector.
4. If proper voltage reading is not obtained, replace TPS sensor.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.