2017 Jeep Cherokee Has Rough Idle

Causes of Rough Idling in Your 2017 Jeep Cherokee and How to Resolve the Issue

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
21% chance it's the
Spark Plugs
0%
15% chance it's the
Ignition Coil
0%
64% chance it's
Something else
The most common reasons a 2017 Jeep Cherokee has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: Worn or fouled spark plugs can lead to misfires, poor fuel economy, and difficulty starting the engine.
  • Ignition Coil: A faulty ignition coil can cause misfires, rough idling, and difficulty starting the engine due to inadequate spark delivery to the spark plugs.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2017 Jeep Cherokee has rough idle?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Brake caliper failure occurs in two different ways, and they create different symptoms.

The caliper can become stuck, in which case it won't release the brake pads. The seized caliper will cause the vehicle to brake constantly on one side, forcing the car to move toward that side. This pulling will be accompanied by a strong odor from one wheel.

Another way calipers fail is by leaking. If the caliper leaks, the brake pedal will feel too easy to push, and will sink all the way to the floor when held. Braking will become less effective the longer this goes on. There may also be brake fluid leaking onto the wheel.

Here are a few common symptoms of worn-out brake pads:

  1. Low brake pad warning light is on: Not all vehicles are equipped with this system, but if yours is, this dashboard indicator light will likely be the first signal it’s time to replace your brake pads.
  2. Brakes start to squeal regularly: This is often one of the first signs of worn brake pads and is caused by a metallic piece built into brake pads for this exact purpose. This part contacts the brake rotor to make a squealing or whining noise when the pads are low.
  3. Brakes make loud grinding noise: If not addressed early enough, your brake pads may get so worn that the metal backing plate of the pad grinds against the metal rotor.
  4. Brake pads look thin: You may be able to visually check your brake pad thickness to determine if they need replacement.

Brake rotors are mainly maintenance free, but when they have been subjected to abnormally hard use, the heat they absorb can cause the metal to turn blue, and cracking to occur. When this occurs, customers often specify they have lost braking power, or the vehicle's brakes are making noise. There may be no symptoms at all related to changing the brake rotors, since it is recommended to change brake rotors on most modern vehicles when performing a standard brake service.

Most often, a brake system inspection will just be a routine portion of manufacturer specified maintenance, and will be performed at mileage intervals. In those cases, there will likely be no symptoms. However, when a brake system makes a funny noise, causes vibration, is hard to use, will not slow the vehicle, prevents the vehicle from driving, makes the vehicle pull to one side, or leaks brake fluid, the vehicle will need a visit dedicated to the inspection of the brake system.

What are the steps to diagnose a rough idle in a 2017 Jeep Cherokee?

When diagnosing a rough idle in a 2017 Jeep Cherokee, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by using an OBD-II scanner to identify any error codes that could point to the underlying issue. This initial step can save time and effort by highlighting specific problems. Next, inspect the spark plugs for wear or damage, as faulty plugs can significantly affect engine performance. Following this, examine the air filter for clogs, which can restrict airflow and contribute to an uneven idle. It's also crucial to check vacuum hoses for any leaks, as these can disrupt the air-fuel mixture. After addressing these basic components, turn your attention to the fuel system, ensuring that fuel injectors are clean and the fuel pump is functioning correctly. Additionally, test the idle air control valve and clean the throttle body to remove any carbon buildup that may hinder airflow. Finally, inspect the exhaust system for restrictions and check the engine mounts for any signs of wear. By following this structured diagnostic approach, you can effectively identify and resolve the issues causing a rough idle in your Jeep Cherokee.

What are the common causes of a rough idle in a 2017 Jeep Cherokee?

When dealing with a rough idle in your 2017 Jeep Cherokee, it's essential to understand the common problems that could be at play. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to performance issues. Additionally, worn-out or faulty spark plugs may cause misfiring, contributing to an uneven idle. Another potential issue is vacuum leaks, which can disrupt the air-fuel mixture and negatively impact engine performance. Fuel system problems, such as a clogged fuel filter or malfunctioning fuel injectors, can also hinder proper fuel delivery, resulting in a rough idle. Furthermore, a faulty oxygen sensor can cause the engine to run either too rich or too lean, affecting idle quality. Lastly, throttle body issues, including carbon buildup or sensor malfunctions, can disrupt airflow and exacerbate the rough idle. By regularly maintaining these components and addressing any issues promptly, you can improve your Jeep's performance and enjoy a smoother driving experience.

How urgent is it to address the rough idle in my 2017 Jeep Cherokee?

Addressing a rough idle in your 2017 Jeep Cherokee is not just a matter of comfort; it is crucial for the overall health and safety of your vehicle. A rough idle can indicate serious underlying problems such as faulty spark plugs, fuel system malfunctions, or engine misfires, which, if left unattended, can escalate into more significant issues. Ignoring these symptoms can lead to decreased fuel efficiency, increased emissions, and even engine damage, which could result in costly repairs down the line. Moreover, a rough idle can compromise your vehicle's performance and safety, making it harder to control and increasing the risk of accidents. Therefore, it is essential to prioritize this issue and conduct timely maintenance or repairs to ensure your Jeep Cherokee runs smoothly and efficiently, ultimately prolonging its lifespan and enhancing your driving experience.

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