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 MANUALSCHEVROLET1982CITATION L4-151 2.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORADJUSTMENTS
1982 Chevrolet Citation L4-151 2.5L
Throttle Position Sensor: Adjustments
1982 Chevrolet Citation L4-151 2.5LSECTION Adjustments
Fig. 170 Adjusting Throttle Position Sensor:
1. Remove TBI unit then the TPS as described previously. Loosely reinstall sensor and position TBI unit on intake manifold without installing bolts. Remove fuel pump fuse.
2. Connect three jumper wires between TPS harness and TPS, Fig. 170.
3. With ignition on and engine not running, measure voltage between sensor terminals B and C, Fig. 170, using a digital voltmeter.
4. In the closed throttle position, voltmeter should read 0.795 - 0.845 volts on 4-112 and all V-8 engines, 0.450 - 0.600 on 4-151.
5. Rotate TPS as necessary to bring voltage within specifications. Tighten screws and recheck voltage.
6. Turn ignition off and remove jumper wires.
7. Install TBI unit.
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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.