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 48 (ENGINE CONTROLS - BASIC TESTING - V6)IDLE SPEED & IGNITION TIMINGIDLE MIXTURE ADJUSTMENT
1991 Mercury Tracer Base, 4D Sedan, Automatic
Idle Mixture Adjustment
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Idle Mixture Adjustment
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1994 Mercury Topaz, 1994 Mercury Sable, 1994 Mercury Cougar, 1994 Lincoln Continental, and 1994 Ford Thunderbird. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Idle mixture is not adjustable. If idle mixture is incorrect, see appropriate TESTS W/CODES
article as listed below.
- TESTS W/CODES - EEC 2.5L (for Probe)
- TESTS W/CODES - EEC-IV (3.8L) (for Continental, Cougar, Mustang, Sable, Taurus & Thunderbird)
- TESTS W/CODES - EEC-IV (3.2L SHO) (for Taurus)
- TESTS W/CODES - EEC-IV (3.0L) (for Sable, Taurus, Tempo & Topaz)
- TESTS W/CODES - EEC-V (3.8L) (for Mustang)
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.