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 MANUALSCHEVROLET1992LUMINA APV V6-3800 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORADJUSTMENTS
1992 Chevrolet Lumina APV V6-3800 3.8L
Throttle Position Sensor: Adjustments
1992 Chevrolet Lumina APV V6-3800 3.8LSECTION Adjustments
PROCEDURE:
1. Install three jumper wires between the TPS and the harness connector (or use a "Scan" tool.)
2. With the ignition ON and throttle closed, use a digital voltmeter connected to terminals "B" and "C" (or select TPS with "SCAN" tool), adjust the TPS so output voltage is 0.38-0.42 volts (middle of the operating range).
3. Tighten the screws, recheck the reading to verify the adjustment has not changed.
4. With the ignition OFF, remove the jumper wires and connect the harness to the TPS.
RENDER: 1.0x
NO RELATED
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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.