Why does my Diamante’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 Diamante firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my Mitsubishi Diamante making engine noise?

Unusual noises can signal a problem with your Mitsubishi Diamante engine. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage a Mitsubishi engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mitsubishi Diamante 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 pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I use water in my Mitsubishi Diamante radiator?

It’s not recommended you put water in your Diamante 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.

What could cause my Diamante engine to suddenly stop?

There are different reasons your Diamante 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 Mitsubishi Diamante engine?

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

Reliable Repairs for 1999 Mitsubishi Diamante Engines

Learn about

1999 Mitsubishi Diamante Trim Options

Select your Mitsubishi Diamante trim level to learn more about Mitsubishi-recommended engine repair. Use the following chart to find information.

V6/3.5L

1999 Mitsubishi Diamante Repair

Nothing lasts forever. Even your Mitsubishi Diamante’s engine parts and components will change. When something breaks, we're ready. Select a repair or category to learn more about 1999 Mitsubishi Diamante services.

We’re Trained to Care for Mitsubishi Diamante Engines

Mitsubishi Diamante drivers trust that their Diamante 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 sideways sometimes. If the unexpected strikes, you may search the internet frantically for quick and affordable 1999 Mitsubishi Diamante engine repairs. 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 Mitsubishi Diamante engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Check Engine Light on 1999 Mitsubishi Diamante

As soon as your Diamante 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 car’s ignition, Potential causes may include a faulty oxygen sensor, bad spark plug, issues with your catalytic converter, or a leak in the engine vacuum, but that's only a few of the possible causes. Bring your Diamante to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. engine rattling, burning smells, or engine misfiring.

Engine Repairs for Your 1999 Diamante

When your Mitsubishi Diamante engine needs repairs, our technicians will provide you with a thorough explanation beforehand. 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. By choosing Firestone Complete Auto Care for Diamante engine repairs and you can drive easy knowing that we use Mitsubishi-approved parts and fluids — serpentine belt, oil gasket, fuses, or a different component.

1999 Mitsubishi Diamante Engine Q&A

Why does my Diamante’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 Diamante firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Mitsubishi Diamante making engine noise? Unusual noises can signal a problem with your Mitsubishi Diamante engine. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage a Mitsubishi engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mitsubishi Diamante 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 pushing 'the pedal to the metal' before the engine has warmed up. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I use water in my Mitsubishi Diamante radiator? It’s not recommended you put water in your Diamante 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.
What could cause my Diamante engine to suddenly stop? There are different reasons your Diamante 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 Mitsubishi Diamante engine? Your local Firestone Complete Auto Care offers Mitsubishi Diamante engine repair. Schedule an appointment today at one of our thousands of locations nationwide!