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 MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 37 (ENGINE CONTROLS - SYSTEM/COMPONENT TESTS)ENGINE SENSORS & SWITCHESTHROTTLE POSITION SENSOR (TPS)
1984 Plymouth Horizon Base, 1.6 A
Throttle Position Sensor (TPS)
1984 Plymouth Horizon Base, 1.6 ASECTION Throttle Position Sensor (TPS)
WARNING: This page is about a different car, the 1994 Plymouth Laser and 1994 Eagle Talon. However, it is still accessible from the selected car via links, so may be relevant.
- TPS is located on throttle body. Disconnect TPS connector. Measure resistance between TPS terminals No. 4 (sensor ground) and No. 1 (sensor power). See Fig 1 .
- Resistance should be approximately 3500-6500 ohms. If resistance is not within specification, replace TPS. If resistance is within specification, go to next step.
- Connect an ohmmeter between terminals No. 4 (sensor ground) and No. 2 (sensor output). See Fig 1 . Operate throttle valve slowly from idle position to fully open position. Resistance should change smoothly in proportion to throttle valve opening angle. Replace TPS if it does not test as described.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.