LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 1988 >> Reatta >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Multi-Port >> Adjustments >> Throttle Position Sensor (TPS)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Throttle Position Sensor (TPS)

NOTE: Throttle position sensor on 2.0L and 2.8L (VIN 9) are not adjustable.
  1. 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.
  2. 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