Why does the check engine light come on when I start my Grand Marquis?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your Grand Marquis testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my Mercury Grand Marquis making engine noise?

Strange engine sounds can be a sign something’s off in your Mercury Grand Marquis. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my Mercury Grand Marquis engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Is it okay to put water in my Mercury Grand Marquis radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What can cause a Grand Marquis engine to suddenly stop?

If your Grand Marquis car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who can repair my Mercury Grand Marquis engine?

Your local Firestone Complete Auto Care offers Mercury Grand Marquis engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 1999 Mercury Grand Marquis

Learn about

1999 Mercury Grand Marquis Trim Options

Select your Mercury Grand Marquis trim level to learn more about Mercury-recommended engine repair. Use the following chart to find information.

V8/4.6L

Mercury Grand Marquis Repairs and Services

Stuff wears out. Even your Mercury Grand Marquis’s engine parts and components will change. We’re here to help when something stops working. Click on a repair below to learn more about 1999 Mercury Grand Marquis repairs.

We Care for Mercury Grand Marquis Engines

The Mercury Grand Marquis is respected for its reliability. You may have even been thinking about that when you bought it. Even so, pieces and parts can break down over time. Things can go sideways sometimes. If they do, you’ll have to find a dependable 1999 Mercury service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Mercury Grand Marquis engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 1999 Mercury Grand Marquis Check Engine Light Is On

As soon as your Grand Marquis check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission control system that won’t go away on its own. Causes may include a faulty oxygen sensor, damaged spark plug, a problem with your catalytic converter, or a leaking engine vacuum, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your Grand Marquis issues diagnosed and we'll determine exactly why your check engine light is on. Other signs it's time for Mercury Grand Marquis engine service might include burning smells, or engine misfiring.

Engine Repairs for Your 1999 Grand Marquis

If your 1999 Grand Marquis engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. If a service can wait, we’ll make sure you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 1999 Grand Marquis engine repairs and you can feel confident knowing that we use Mercury-approved parts and components like the timing belt, motor oil seal, sensors, or a different component.

Engine Q&A 1999 Mercury Grand Marquis

Why does the check engine light come on when I start my Grand Marquis? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your Grand Marquis testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Mercury Grand Marquis making engine noise? Strange engine sounds can be a sign something’s off in your Mercury Grand Marquis. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my Mercury Grand Marquis engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Is it okay to put water in my Mercury Grand Marquis radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What can cause a Grand Marquis engine to suddenly stop? If your Grand Marquis car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who can repair my Mercury Grand Marquis engine? Your local Firestone Complete Auto Care offers Mercury Grand Marquis engine repair. Schedule an appointment today at one of our thousands of locations nationwide!