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.
1988 Buick ReattaFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor (TPS)
NOTE:
Throttle position sensor on 2.0L and 2.8L (VIN 9) are not adjustable.
- Install "Scan" tool and select TPS. With ignition switch in "ON" position, adjust TPS to specification. See TPS SPECIFICATIONS table. Adjust TPS output voltage in closed throttle position.
- Tighten screws to specification. See TORQUE SPECIFICATIONS table. Recheck voltage readings.
TPS SPECIFICATIONS
| Engine | Application Code | Output Voltage |
|---|---|---|
| 2.3L | VIN D | .49-.59 |
| 2.8L | VIN S | .49-.61 |
| 2.8L | VIN W | .45-.61 |
| 3.0L | VIN L | .50-.59 |
| 3.8L | VIN 3 | .36-.44 |
| 3.8L | VIN C | .36-.44 |
| 5.0L | VIN F | .46-.62 |
| 5.7L | VIN 8 | .46-.62 |
Factory Service Tools
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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.