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 MANUALSFORD1991TAURUS L, 4D SEDAN, 3.8 4REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SYSTEM/COMPONENT TESTS - 3.8LTFI-IV SYSTEMTEST EQUIPMENT
1991 Ford Taurus L, 4D Sedan, 3.8 4
Test Equipment
1991 Ford Taurus L, 4D Sedan, 3.8 4SECTION Test Equipment
The following test equipment should be used in TFI-IV ignition system tests:
- Spark Tester (D81P-6666-A)
- Volt-Ohmmeter
- 12-Volt Test Light
- Small Straight Pin
- Remote Starter Switch
- E-Core Ignition Coil (E73F-12029-AB)
- Ignition Coil Secondary Wire
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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.