Why does the check engine light in my Sigma turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your Sigma testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why does my Mitsubishi engine sound different?

Strange under-the-hood noises can point to problems within your Mitsubishi Sigma engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage a Mitsubishi engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mitsubishi Sigma engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I add water to my Mitsubishi Sigma radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What can cause the engine in my Sigma to suddenly stop?

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

Who can repair my Mitsubishi Sigma engine?

For Mitsubishi Sigma engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

1990 Mitsubishi Sigma Engine Repair

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1990 Mitsubishi Sigma Trim Options

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

V6/3.0L

Repairs for Your 1990 Mitsubishi Sigma

Stuff wears out. Even your Mitsubishi Sigma's many parts and pieces. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 1990 Mitsubishi Sigma repairs.

We Care for Mitsubishi Sigma Engines

The Mitsubishi Sigma is respected for its reliability. That might be why you bought it in the first place. However, the wear-proof engine has yet to be invented! Things can go wrong on the road. When they do, you might find yourself searching for 1990 Mitsubishi Sigma engine repair or replacement parts. That's when it's time to head to Firestone Complete Auto Care. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Mitsubishi Sigma engine will be in good hands. 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.

Illuminated Check Engine Light on 1990 Mitsubishi Sigma

An illuminated check engine light on your Mitsubishi Sigma 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 car’s ignition, Possible causes can include a failing oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leak in the engine vacuum, to name a few possible causes. Bring your Sigma in for an on-board diagnostic check and our expert techs will get the root of the problem. engine rattling, oil leaks, or engine misfiring.

Mitsubishi Sigma Engine Repair

When your Mitsubishi Sigma engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We don't start working until we have your approval. If a service can wait, we’ll make sure 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 Sigma engine repairs and you can feel good knowing that we only use Mitsubishi-compliant replacement parts such as the timing belt, valve guide seal, fuses, or another part.

1990 Mitsubishi Sigma Engine Q&A

Why does the check engine light in my Sigma turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your Sigma testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why does my Mitsubishi engine sound different? Strange under-the-hood noises can point to problems within your Mitsubishi Sigma engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a Mitsubishi engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mitsubishi Sigma engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I add water to my Mitsubishi Sigma radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What can cause the engine in my Sigma to suddenly stop? Reasons your Sigma car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who can repair my Mitsubishi Sigma engine? For Mitsubishi Sigma engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.