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

Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are Mercury Grand Marquis engine noises bad?

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 a sign of brake problems rather than engine issues.

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 damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is 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?

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?

There are different reasons your Grand Marquis vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who can repair my Mercury Grand Marquis engine?

Your local Firestone Complete Auto Care has you covered with expert Grand Marquis engine repair. Schedule an appointment today and see us at one of our thousands of locations.

1985 Mercury Grand Marquis Engine Repair

Learn about

1985 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.

V8/5.0L

V8/5.8L

1985 Mercury Grand Marquis Repair

Nothing stays the same forever. Even your Mercury Grand Marquis's many parts and pieces. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 1985 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. However, the wear-proof engine has yet to be invented! Things can go sideways sometimes. If the unexpected strikes, you may search the internet frantically for quick and affordable 1985 Mercury Grand Marquis engine repairs. 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. Schedule a courtesy inspection at the first sign of engine trouble. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Illuminated Check Engine Light on 1985 Mercury Grand Marquis

If your Grand Marquis check engine light is on, it’s time to get it looked at. A check engine light that’s flashing or steadily illuminated could point to problems with your fuel, Possible causes can include a failing oxygen sensor, damaged spark plug, a problem with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your Grand Marquis issues diagnosed and our expert techs will get the root of the problem. Other signs your Mercury Grand Marquis engine needs some TLC are essential fluid leaks, or engine misfiring.

Mercury Grand Marquis Engine Repair

If your 1985 Mercury Grand Marquis needs engine repair, our technicians will provide you with a thorough explanation beforehand. We don't start working until we have your approval. If a repair isn’t urgent right now, we’ll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to provide you with the information you need to make an informed engine repair decision. 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 chain or belt, motor oil seal, ignition coil, or a different component.

Engine Q&A 1985 Mercury Grand Marquis

Why does my Grand Marquis’s check engine light come on when I start it? Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are Mercury Grand Marquis engine noises bad? 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 a sign of brake problems rather than engine issues.
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 damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is 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? 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? There are different reasons your Grand Marquis vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who can repair my Mercury Grand Marquis engine? Your local Firestone Complete Auto Care has you covered with expert Grand Marquis engine repair. Schedule an appointment today and see us at one of our thousands of locations.