Why does my CJ7’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 light should turn off in a bit, but come see us if it doesn't.

Why is my Jeep CJ7 making engine noise?

Unusual noises can signal a problem with your Jeep CJ7 engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have 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 my Jeep CJ7 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I use water in my Jeep CJ7 radiator?

While it’s not recommended, you can use water in your CJ7 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 the engine in my CJ7 to suddenly stop?

Reasons your CJ7 car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who repairs Jeep CJ7 engines?

For Jeep CJ7 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.

Engine Repairs for Your 1986 Jeep CJ7

Learn about

1986 Jeep CJ7 Trim Options

Select your Jeep CJ7 trim level to learn more about Jeep-recommended engine repair. Use the following chart to find information.

L4/2.5L

L6/4.2L

L6/4.6L

1986 Jeep CJ7 Repair

Nothing stays the same forever. Even your Jeep CJ7's many parts and pieces. We’re here to help when something stops working. Select a repair or category to learn more about 1986 Jeep CJ7 services.

We’re Trained to Care for Jeep CJ7 Engines

Jeep CJ7 drivers trust that their CJ7 will take them near and far. That might be why you bought it in the first place. Even so, pieces and parts can break down over time. Things can go sideways sometimes. When they do, you might find yourself searching for 1986 Jeep CJ7 engine repair or replacement parts. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced more than 500 million vehicles since 1926, and our technicians know Jeep CJ7 engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 1986 Jeep CJ7 Check Engine Light Is On

As soon as your CJ7 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 control system that won’t go away on its own. Causes may include a faulty oxygen sensor, worn spark plug, a problem with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your CJ7 in for an on-board diagnostic check and our expert techs will get the root of the problem. engine rattling, oil leaks, or misfiring.

Jeep CJ7 Engine Repair

If your 1986 CJ7 engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. 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. Choose Firestone Complete Auto Care for Jeep CJ7 engine repairs and you can feel confident knowing that we use Jeep-approved parts and components like the cambelt, engine oil seal, ignition coil, or a different component.

Engine Q&A 1986 Jeep CJ7

Why does my CJ7’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 light should turn off in a bit, but come see us if it doesn't.
Why is my Jeep CJ7 making engine noise? Unusual noises can signal a problem with your Jeep CJ7 engine. Tapping or knocking could mean you need an oil change. Whistling sounds could mean you have 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 my Jeep CJ7 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I use water in my Jeep CJ7 radiator? While it’s not recommended, you can use water in your CJ7 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 the engine in my CJ7 to suddenly stop? Reasons your CJ7 car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who repairs Jeep CJ7 engines? For Jeep CJ7 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.