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 MANUALSOLDSMOBILE1989DELTA 88 V6-3800 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORSERVICE AND REPAIR
1989 Oldsmobile Delta 88 V6-3800 3.8L
Throttle Position Sensor: Service and Repair
1989 Oldsmobile Delta 88 V6-3800 3.8LSECTION Service and Repair
MPFI Throttle Body:
NOTE: The throttle position sensor is a component of the Computerized Engine Control System, for diagnosis and testing procedures see COMPUTERIZED ENGINE CONTROLS/DIAGNOSIS AND TESTING.
REMOVAL:
1. Disconnect the electrical connector from the throttle position sensor.
2. Remove the PCV vent hose.
3. Remove the TPS attaching screws.
4. Remove the throttle position sensor.
INSTALLATION:
1. With throttle valve in the normal closed idle position, install the throttle position sensor on the throttle body assembly, making sure the TPS pickup lever is located ABOVE the tang on the throttle actuator lever.
2. Install the retainers and 2 TPS screws using a thread locking compound on the screws. Loctite 262, GM Part No. 1052624 or equivalent should be used.
NOTE: DO NOT tighten the screws until the TPS is adjusted.
ADJUSTMENT:
3. Install three jumper wires between the TPS and the harness connector or use a SCAN tool.
4. With the ignition ON, use a digital voltmeter connected to terminals B and C and adjust TPS to obtain 0.33 to 0.46 Volts.
5. Tighten the screws to 2.0 Nm (18.0 lb.in), then recheck to insure the adjustment has not changed.
6. 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.