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 MANUALSMERCURY1989COUGAR/XR7 V6-232 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE POSITION SENSORDESCRIPTION AND OPERATION
1989 Mercury Cougar/XR7 V6-232 3.8L
Throttle Position Sensor: Description and Operation
1989 Mercury Cougar/XR7 V6-232 3.8LSECTION Description and Operation
The throttle position sensor is used by the EEC computer to determine the operating mode (closed throttle, part throttle or wide open throttle) for selection of the proper air/fuel mixture, spark and EGR.
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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.