Why does my Grand Marquis’s check engine light come on when I start it?

It’s usually normal for your check engine light to turn on upon ignition. This is just your Grand Marquis testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why does my Mercury engine sound different?

Strange under-the-hood noises can point to problems within your Mercury Grand Marquis engine. 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 indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage my Mercury Grand Marquis engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

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

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your Grand Marquis when you’re out of coolant, having water in the coolant reservoir is better than nothing.

Why did my Grand Marquis engine suddenly stop?

Your Grand Marquis car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who fixes Mercury Grand Marquis engines?

Your local Firestone Complete Auto Care fixes Mercury Grand Marquis engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 2004 Mercury Grand Marquis Engines

Learn about

2004 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

2004 Mercury Grand Marquis Repair

Stuff wears out. Even your Mercury Grand Marquis’s engine parts and components will change. When something breaks, we're ready. Select a service or repair below to learn more about what we can do for your 2004 Mercury Grand Marquis.

We’re Trained to Care for Mercury Grand Marquis Engines

Mercury Grand Marquis drivers trust that their Grand Marquis will take them near and far. You may have even been thinking about that when you bought it. However, the wear-proof engine has yet to be invented! Things can go wrong on the road. If they do, you’ll have to find a dependable 2004 Mercury service center — quick! That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Mercury Grand Marquis engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Illuminated Check Engine Light on 2004 Mercury Grand Marquis

As soon as your Grand Marquis check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your or emission system, and it won’t go away by ignoring it. Potential causes may include a faulty oxygen sensor, damaged spark plug, issues with your catalytic converter, or a leak in the engine vacuum, to name a few possible causes. Bring your Grand Marquis in for an on-board diagnostic check 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.

Mercury Grand Marquis Engine Repair

If your 2004 Mercury Grand Marquis needs engine repair, our technicians will make sure you understand what’s going on before they start working on your engine. We never do any work without your sign-off. If a service can wait, we’ll make sure you know. We'll also tell you if it's necessary for your safety. We want to provide you with the information you need to make an informed engine repair decision. Turn to Firestone Complete Auto Care for your 2004 Grand Marquis engine repairs and you can feel confident knowing that we use Mercury-approved parts and components like the timing chain or belt, motor oil seal, fuses, or another part.

Questions About 2004 Mercury Grand Marquis Engines

Why does my Grand Marquis’s check engine light come on when I start it? It’s usually normal for your check engine light to turn on upon ignition. This is just your Grand Marquis testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why does my Mercury engine sound different? Strange under-the-hood noises can point to problems within your Mercury Grand Marquis engine. 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 indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage my Mercury Grand Marquis engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Is it okay to put water in my Mercury Grand Marquis radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your Grand Marquis when you’re out of coolant, having water in the coolant reservoir is better than nothing.
Why did my Grand Marquis engine suddenly stop? Your Grand Marquis car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who fixes Mercury Grand Marquis engines? Your local Firestone Complete Auto Care fixes Mercury Grand Marquis engines. Book an appointment today! We have thousands of locations across the country.