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 MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORADJUSTMENTS
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Throttle Position Sensor: Adjustments
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Adjustments
Engines with EEC lll: Turn ignition to RUN position and remove vacuum hose from throttle kicker, as equipped. With engine not running, compare voltage reading against specifications and adjust as needed.
Engines with EEC lV: Connect positive probe of DVOM along terminal C (lower) of TPS and connect negative probe along terminal A (upper). Turn ignition on but do not start vehicle. Adjust TPS to specified value.
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:
- • 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.