2014 Mitsubishi Outlander Has Rough Idle

Common Causes of Rough Idling in Your 2014 Mitsubishi Outlander and How to Resolve Them

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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 2014 Mitsubishi Outlander 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 2014 Mitsubishi Outlander 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.

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 initial diagnostic steps to take for a rough idle in a 2014 Mitsubishi Outlander?

When faced with a rough idle in your 2014 Mitsubishi Outlander, start by checking the spark plugs, as worn or dirty plugs can significantly affect engine performance. Next, examine the air filter; a clogged filter can restrict airflow, leading to an unstable idle. It's also crucial to inspect the fuel system, including the fuel filter and injectors, for any blockages or malfunctions that could hinder fuel delivery. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. Lastly, don't overlook the possibility of vacuum leaks, which can disrupt the air-fuel mixture; inspect all vacuum hoses and connections for signs of wear or damage. By systematically addressing these areas, you can effectively diagnose and resolve the rough idle issue, ensuring your Outlander runs smoothly.

What are the common causes of a rough idle in a 2014 Mitsubishi Outlander?

When diagnosing a rough idle in a 2014 Mitsubishi Outlander, it's essential to consider several 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, faulty spark plugs are notorious for causing misfires, which can manifest as a rough idle. Another potential issue is vacuum leaks; these can disrupt the delicate balance of the air-fuel mixture, resulting in an unstable idle. Fuel system problems, such as clogged fuel filters or malfunctioning fuel injectors, can also hinder engine performance and contribute to rough idling. Furthermore, a faulty mass airflow sensor may misread the air entering the engine, affecting the air-fuel mixture and causing irregular idling. Lastly, issues within the ignition system, including faulty ignition coils or distributors, can lead to similar symptoms. By understanding these common causes, DIY enthusiasts can better troubleshoot and address the rough idle issue in their Outlander, ensuring smoother engine performance through regular maintenance and timely repairs.

How urgent is it to address the rough idle in a 2014 Mitsubishi Outlander?

Addressing a rough idle in your 2014 Mitsubishi Outlander is not just a matter of comfort; it is crucial for the vehicle's overall health and performance. A rough idle can indicate underlying engine problems, such as issues with the fuel or ignition systems, which, if left unchecked, may lead to more severe complications. Ignoring this symptom can result in decreased fuel efficiency and poor vehicle performance, ultimately risking significant engine damage over time. Moreover, a rough idle can sometimes signal more serious issues that could escalate quickly, making timely intervention essential. Regular maintenance and prompt repairs not only enhance your driving experience but also safeguard your investment by ensuring that your vehicle operates efficiently and reliably. Therefore, it is imperative to address any rough idle symptoms as soon as they arise to prevent further complications and maintain the longevity of your Outlander.

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2014 Mitsubishi Outlander Rough Idle: Causes & Repairs