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 162 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTS - EEC-V)FUEL SYSTEMFUEL DELIVERYFUEL PUMP RELAY
1991 Mercury Tracer Base, 4D Sedan, Automatic
Fuel Pump Relay
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Fuel Pump Relay
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1996 Mercury Tracer, 1996 Mercury Sable, 1996 Mercury Mystique, 1996 Mercury Grand Marquis, and 1996 Mercury Cougar. However, it is still accessible from the selected car via links, so may be relevant.
See FUEL PUMP RELAY under MODULES, MOTORS, RELAYS & SOLENOIDS.
CAUTION:
Inspect fuel system for leaks and damage before testing fuel pump.
- 1) System Integrity Check
Perform the following checks:- Visually inspect fuel system (fuel lines, filter, pump, injectors, pressure regulator, etc.).
- Ensure Inertia Fuel Shutoff (IFS) switch reset button is not in upper (tripped) position.
- Ensure battery is fully charged and fuel-related fuses are okay.
- Check fuel tank contents and fuel gauge accuracy. On vehicles with 2 fuel tanks, check both tanks. If any fault is detected, repair as necessary. If system checks are okay, go to next step.
- 2) Check Fuel Pressure
Install fuel pressure gauge. Check and record fuel pressure. For 1995 fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article. For 1996 fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article. If fuel pressure is as specified, testing is complete. If fuel pressure is not as specified, proceed as follows:- For Natural Gas Vehicles
Go to CIRCUIT TEST HB, step 1) under CIRCUIT TESTS in appropriate G - TEST W/CODES article. - For Models Except Natural Gas Vehicles
Go to CIRCUIT TEST HC, step 1) under CIRCUIT TESTS in appropriate G - TEST W/CODES article.
- For Natural Gas Vehicles
RENDER: 1.0x
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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.