Tools and materials needed:
- Socket wrench set
- Phillips screwdriver
- Flat-head screwdriver
- New TPS sensor
- RTV silicone sealant
Steps:
1. Disconnect the battery:
- Ensure that your vehicle is turned off.
- Detach the negative battery terminal to avoid any electrical accidents.
2. Locate the TPS sensor:
- Open the hood of your S10 pickup and find the air intake.
- Remove the air intake hose to access the throttle body.
- The TPS sensor is usually mounted on the throttle body. It's a small, cylindrical-shaped sensor with a connector attached.
3. Disconnect the TPS sensor connector:
- Press the release tab on the TPS sensor connector and gently unplug it.
4. Remove the TPS sensor:
- Use a Phillips screwdriver to remove the screws holding the TPS sensor in place.
- Carefully remove the old TPS sensor from the throttle body.
5. Clean the mounting surface:
- Use a flat-head screwdriver to remove any dirt or old gasket material from the TPS sensor mounting surface on the throttle body.
- Ensure the surface is clean and free from debris.
6. Install the new TPS sensor:
- Position the new TPS sensor onto the mounting surface.
- Secure the sensor with the screws you removed earlier. Tighten them until they are snug, but do not over-tighten.
7. Apply RTV silicone sealant:
- Apply a thin bead of RTV silicone sealant around the base of the TPS sensor to prevent air leaks.
8. Reconnect the TPS sensor connector:
- Align the connector with the TPS sensor and gently press it until it snaps into place.
9. Reinstall the air intake hose:
- Reattach the air intake hose that you removed earlier to access the throttle body.
- Make sure it's properly connected.
10. Reconnect the battery:
- Reconnect the negative battery terminal to restore power to the vehicle.
11. Test the TPS sensor:
- Start the engine and let it reach its normal operating temperature.
- Connect a voltmeter to the TPS sensor's signal terminal and ground terminal.
- The voltage should ideally range between 0.5 volts at closed throttle and 4.5 volts at wide-open throttle.
- If the voltage is not within these ranges, the TPS sensor may need adjustment.
12. Reset the engine computer (ECU):
- Disconnect the battery and leave it disconnected for a few minutes. This will reset the ECU and help it adapt to the new TPS sensor.
Once the above steps are completed, the TPS sensor on your 99 S10 pickup should be successfully replaced. Make sure to test it and ensure it's working correctly. If you encounter any difficulties or have concerns about the replacement process, it's advisable to consult a qualified mechanic or refer to your vehicle's service manual.
