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 DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURESFUEL SYSTEMPRELIMINARY CHECKSENGINE CRANKS BUT WILL NOT START
1991 Mercury Tracer Base, 4D Sedan, Automatic
Engine Cranks But Will Not Start
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Engine Cranks But Will Not Start
- Check fuel tank contents and fuel gauge accuracy. Check for dirt, water or other contamination in fuel.
- Check ignition system for strong secondary current at spark plugs. If no spark exists or if spark is weak, repair ignition system problem first.
- Check fuel lines and fittings for leaks. If no leaks are found, check fuel delivery system for proper pressure and volumes. Reset inertia switch (if necessary).
- Check for a defective fuel injector or coolant temperature sensor. Ensure that TPS is not sticking. ALWAYS relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components.
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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.