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 MANUALSCADILLAC1991FLEETWOOD FWD V8-300 4.9LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORSERVICE AND REPAIR
1991 Cadillac Fleetwood FWD V8-300 4.9L
Throttle Position Sensor: Service and Repair
1991 Cadillac Fleetwood FWD V8-300 4.9LSECTION Service and Repair
Throttle Body Assembly - Exploded View:
REMOVAL:
1. Remove the air cleaner.
2. Disconnect the electrical connector.
3. Remove the two TPS attaching screws and retainers.
4. Remove the Throttle Position Sensor.
INSTALLATION:
1. With the throttle valve in the normally closed position, install the Throttle Position Sensor (TPS) on the throttle body assembly. Be sure the throttle shaft flats engage the TPS drive tongs.
2. Install the two TPS attaching screws with retainers. DO NOT tighten screws until TPS is adjusted.
3. Connect the electrical connector.
4. Adjust the TPS, refer to ADJUSTMENT PROCEDURES/MINIMUM AIR, TPS AND ISC MOTOR ADJUSTMENTS.
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.