2013 Jeep Compass Has Rough Idle

Common Causes of Rough Idling in Your 2013 Jeep Compass and How to Resolve Them

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Reviewed by
Andrew Hajjar
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 2013 Jeep Compass has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: A worn or fouled spark plug can cause misfires, rough idling, and decreased fuel efficiency due to incomplete combustion.
  • 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 2013 Jeep Compass 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.

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.

Customers with drum brake systems often specify they have lost braking power, or that the vehicle's brakes are making noise. This is because brake drums do not dissipate heat very well, so the heat from hard braking will cause stress fractures. These fractures make can make noise on the brake shoes as the drum revolves around the shoes. Lastly, the brake shoes may not be problematic, but may cause a grinding noise while stopping. This would indicate the shoes have no braking material left, and the brake shoes must be changed before the vehicle can be safely driven.

Learn more about brake shoe symptoms

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 2013 Jeep Compass?

To effectively diagnose a rough idle in your 2013 Jeep Compass, start by checking for any trouble codes using an OBD-II scanner, as these codes can provide crucial insights into the underlying issues. If the check engine light is illuminated, this step is essential. Next, examine the throttle position sensor (TPS) by measuring its resistance with a multimeter; this will help confirm whether it is functioning properly. Following this, inspect the fuel injectors to ensure they are delivering a consistent flow of fuel, as any irregularities can lead to uneven engine performance. Additionally, check the condition of the spark plugs, as misfires caused by dirty or worn plugs are a common culprit of rough idling. Lastly, look for any vacuum leaks in the hoses connected to the engine, as these can disrupt the air-fuel mixture and exacerbate idling issues. By following this structured diagnostic approach, you can systematically identify and address the causes of a rough idle in your Jeep Compass.

How urgent is it to address the rough idle in a 2013 Jeep Compass?

Addressing a rough idle in your 2013 Jeep Compass is not just a matter of comfort; it is crucial for the longevity and safety of your vehicle. A rough idle can signal various underlying problems, such as vacuum leaks or faulty spark plugs, which, if ignored, may escalate into more severe engine issues. The urgency of resolving this symptom cannot be overstated, as neglecting it could lead to costly repairs and diminished vehicle performance. Additionally, a rough idle often results in decreased fuel efficiency, which can strain your budget over time. More critically, delaying repairs may result in dangerous drivability issues, including stalling or difficulty accelerating, which can pose safety risks on the road. Therefore, it is essential to address a rough idle promptly to maintain your Jeep Compass's performance and ensure a safe driving experience.

What are the common causes of a rough idle in a 2013 Jeep Compass?

When dealing with a rough idle in your 2013 Jeep Compass, it's essential to understand the common problems that may be at play. One of the primary culprits is a vacuum leak, which can disrupt the air-fuel mixture and lead to unstable engine performance. Additionally, issues with the spark plugs are frequent offenders; even modern iridium plugs require regular maintenance to prevent misfires that can cause rough idling. Another significant factor is the ignition coil, which, if malfunctioning, can result in symptoms such as engine hesitation, loss of power, and increased fuel consumption. If you notice the check engine light illuminating, it may indicate these ignition system problems. Addressing these issues promptly not only enhances your vehicle's performance but also ensures a smoother driving experience. By understanding these common causes, you can take the necessary steps to troubleshoot and resolve the rough idle in your Jeep Compass, making it a rewarding DIY project.

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2013 Jeep Compass Rough Idle: Causes & Repairs | RepairPal