Why does the check engine light in my J20 turn on when I start my car?

It’s usually normal for your check engine light to turn on upon ignition. 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 is my Jeep J20 making engine noise?

Strange engine sounds can be a sign something’s off in your Jeep J20. Knocking or tapping could be a symptom of low 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 my Jeep J20 engine?

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

Can I add water to my Jeep J20 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 could cause my J20 engine to suddenly stop?

Your J20 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who repairs Jeep J20 engines?

Your local Firestone Complete Auto Care offers Jeep J20 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

1985 Jeep J20 Engine Repair

Learn about

1985 Jeep J20 Trim Options

Select your Jeep J20 trim level to learn more about Jeep-recommended engine repair. Use the following chart to find information.

V8/5.9L

1985 Jeep J20 Repair

Nothing lasts forever. Even your Jeep J20’s engine parts and components will change. When something breaks, we're ready. Click on a repair below to learn more about 1985 Jeep J20 repairs.

We Know Jeep J20 Engines

Jeep J20 engines are known for their 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. If the unexpected strikes, you may search the internet frantically for quick and affordable 1985 Jeep J20 engine repairs. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Jeep J20 engine will be in good hands. 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 1985 Jeep J20 Check Engine Light Is On

As soon as your J20 check engine light turns on, it’s time to get an expert’s opinion. 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. Potential causes may include a faulty oxygen sensor, bad spark plug, issues 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 J20 issues diagnosed and we'll determine exactly why your check engine light is on. engine pinging noises, essential fluid leaks, or a sinking feeling that something’s wrong.

Engine Repairs for Your 1985 J20

If your 1985 Jeep J20 needs engine repair, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a repair can wait, 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 give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 1985 J20 engine repairs and you can feel confident knowing that we use Jeep-approved parts and components like the timing chain or belt, motor oil seal, sensors, or another part.

Engine Q&A 1985 Jeep J20

Why does the check engine light in my J20 turn on when I start my car? It’s usually normal for your check engine light to turn on upon ignition. 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 is my Jeep J20 making engine noise? Strange engine sounds can be a sign something’s off in your Jeep J20. Knocking or tapping could be a symptom of low 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 my Jeep J20 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my Jeep J20 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 could cause my J20 engine to suddenly stop? Your J20 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who repairs Jeep J20 engines? Your local Firestone Complete Auto Care offers Jeep J20 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!