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.

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 need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by 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?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Can I put water in my Mercury Grand Marquis radiator?

While it’s not recommended, you can use water in your Grand Marquis radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

What can cause a Grand Marquis engine to 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 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!

Reliable Repairs for 1990 Mercury Grand Marquis Engines

Learn about

1990 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.

V8/5.0L

Repairs for Your 1990 Mercury Grand Marquis

Stuff wears out. Even your Mercury Grand Marquis’s engine parts and components will change. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 1990 Mercury Grand Marquis repairs.

We Know 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 wrong on the road. When they do, you might find yourself searching for 1990 Mercury Grand Marquis engine repair or replacement parts. 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. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 1990 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 on or flashing could be a symptom of a serious problem in your fuel, Possible causes can include a failing oxygen sensor, bad spark plug, issues 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 figure out why that check engine light is giving you grief. engine pinging noises, burning smells, or a sinking feeling that something’s wrong.

Engine Repairs for Your 1990 Grand Marquis

If your 1990 Grand Marquis engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We don't start working until we have your approval. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. 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 1990 Grand Marquis engine repairs and you can feel confident knowing that we use Mercury-approved parts and components like the serpentine belt, oil gasket, sensors, or other parts.

Questions About 1990 Mercury Grand Marquis Engines

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.
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 need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by 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? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I put water in my Mercury Grand Marquis radiator? While it’s not recommended, you can use water in your Grand Marquis radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
What can cause a Grand Marquis engine to 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 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!