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 SENSORSPECIFICATIONSELECTRICAL SPECIFICATIONS
1989 Mercury Cougar/XR7 V6-232 3.8L
Electrical Specifications
1989 Mercury Cougar/XR7 V6-232 3.8LSECTION Electrical Specifications
Throttle Position Sensor (TPS):
Engines with EEC III: 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 IV: Connect positive (+) probe of DVOM along the DG/LG wire of TPS. Connect negative (-) probe along the BK/W wire and turn ignition on but do not start engine. Adjust TPS to specified value.
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.