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

It's okay if your check engine light comes on when you first start your vehicle. It’s just your Grand Marquis firing up its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why does my Mercury engine sound different?

Unusual noises can signal a problem with your Mercury Grand Marquis engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage a Mercury engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercury Grand Marquis engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I put water in my Mercury Grand Marquis radiator?

It’s not recommended you put water in your Grand Marquis radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

Why did my Grand Marquis engine suddenly stop?

Reasons your Grand Marquis car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who repairs Mercury Grand Marquis engines?

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 2005 Mercury Grand Marquis

Learn about

2005 Mercury Grand Marquis Trim Options

Select your Mercury Grand Marquis trim level to learn more about Mercury-recommended engine repair. Even Mercury Grand Marquis parts will get older and change.

V8/4.6L

2005 Mercury Grand Marquis Repair

Nothing lasts forever. Even your Mercury Grand Marquis’s engine parts and components will change. When something breaks, we're ready. Click on a repair below to learn more about 2005 Mercury Grand Marquis repairs.

We Care for Mercury Grand Marquis Engines

Mercury Grand Marquis drivers trust that their Grand Marquis will take them near and far. You probably thought about that when you got it. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. If they do, you’ll have to find a dependable 2005 Mercury service center — quick! That’s where Firestone Complete Auto Care comes in. We've serviced more than 500 million vehicles since 1926, and our technicians know 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 2005 Mercury Grand Marquis Check Engine Light Is On

An illuminated check engine light on your Mercury Grand Marquis is one of the first signs it's time to 'brake' for engine service. A check engine light that’s flashing or steadily illuminated could point to problems with your or emission system that won't go away on its own. Causes may include a faulty oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leak in the engine vacuum, but that's only a few of the 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 your Mercury Grand Marquis engine needs some TLC are burning smells, or misfiring.

2005 Grand Marquis Engine Services

If your 2005 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 don't start working until we have your approval. If a repair isn’t urgent right now, we’ll let you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to give you all the details you need to make an informed decision about your engine repairs. By choosing Firestone Complete Auto Care for Grand Marquis engine repairs and you can feel good knowing that we only use Mercury-compliant replacement parts such as the timing belt, motor oil seal, sensors, or a different component.

Engine Q&A 2005 Mercury Grand Marquis

Why does my Grand Marquis’s check engine light come on when I start it? It's okay if your check engine light comes on when you first start your vehicle. It’s just your Grand Marquis firing up its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why does my Mercury engine sound different? Unusual noises can signal a problem with your Mercury Grand Marquis engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage a Mercury engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercury Grand Marquis engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I put water in my Mercury Grand Marquis radiator? It’s not recommended you put water in your Grand Marquis radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
Why did my Grand Marquis engine suddenly stop? Reasons your Grand Marquis car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who repairs Mercury Grand Marquis engines? Your local Firestone Complete Auto Care offers Mercury Grand Marquis engine repair. Schedule an appointment today at one of our thousands of locations nationwide!