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.
1991 Hyundai Excel GL, AutomaticFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor
- Loosen throttle cable. With ignition off, connect a digital voltmeter between terminals No. 1 (Black wire) and No. 2 (Light Green/Yellow wire) of Throttle Position Sensor (TPS) connector. DO NOT disconnect TPS connector; backprobe through rear of connector.
- Turn ignition on, but DO NOT start engine. Check TPS voltage. If reading is not .48-.52 volt, adjust TPS until correct voltage is obtained. Turn ignition off and disconnect digital voltmeter. Adjust throttle cable. Disconnect vehicle battery for 15 seconds or more. Start engine and check idle speed.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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