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 MANUALSPLYMOUTH1990LASER RS, 2.0 R, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSINTRODUCTIONTHROTTLE POSITION SENSOR (TPS)
1990 Plymouth Laser RS, 2.0 R, Standard
Throttle Position Sensor (TPS)
1990 Plymouth Laser RS, 2.0 R, StandardSECTION Throttle Position Sensor (TPS)
- Loosen throttle cable. With ignition off, connect a digital volt-ohm meter (DVOM) between Electronic Control Unit (ECU) terminals No. 19 and 24. Turn ignition on. DO NOT start engine.
- Check TPS voltage. See TPS VOLTAGE SPECIFICATION . Adjust TPS until correct voltage is obtained. Turn ignition off and disconnect DVOM. Adjust throttle cable. Disconnect negative battery cable for 10 seconds or more. Start engine and check idle speed.
TPS VOLTAGE SPECIFICATION
| Application | Voltage |
|---|---|
| All | .48-.52 |
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.