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 MANUALSMERCURY1991TRACER BASE, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 61 (ENGINE CONTROLS - SYSTEM/COMPONENT TESTS - EEC-IV (3.2L SHO))IGNITION SYSTEMEI SYSTEM (LOW DATA RATE)PRELIMINARY CHECK
1991 Mercury Tracer Base, 4D Sedan, Automatic
Preliminary Check
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Preliminary Check
WARNING: This page is about a different car, the 1994 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Perform following checks:
- Inspect engine compartment to ensure all vacuum hoses and spark plug wires are properly routed and securely attached.
- Check all wiring harness connectors for damaged pins and loose or broken conditions.
- Ensure ICM mounting screws are tight.
- Ensure battery is fully charged.
- Ensure all accessories are off during diagnosis.
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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.