2018 INFINITI Q60 Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2018 INFINITI Q60 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 2018 INFINITI Q60 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 2018 INFINITI Q60 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 steps to diagnose a rough idle in a 2018 INFINITI Q60?

To effectively diagnose a rough idle in your 2018 INFINITI Q60, start with the simplest checks to identify potential issues. Begin by using an OBD-II scanner to retrieve any error codes from the vehicle's computer, as these codes can pinpoint specific problems. Next, inspect the spark plugs for wear or fouling, as faulty plugs can lead to misfires that contribute to a rough idle. Following this, examine the ignition system, including coils and wires, to ensure they are functioning properly. A thorough check of the air intake system is also essential; look for obstructions in the air filter, mass airflow sensor, and throttle body that could disrupt the air-fuel mixture. Additionally, assess the fuel system by verifying fuel pressure and inspecting injectors for clogs. Don’t forget to check vacuum hoses for leaks, as these can significantly affect engine performance. Finally, ensure the EGR valve is operating correctly, as a malfunction here can also lead to rough idling. By following this structured approach, you can systematically identify and address the underlying causes of a rough idle, restoring your vehicle's performance.

What are the common causes of a rough idle in a 2018 INFINITI Q60?

When dealing with a rough idle in your 2018 INFINITI Q60, it's crucial 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, 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 a clogged fuel filter or a malfunctioning fuel pump, can also impact engine performance and contribute to a rough idle. Furthermore, a malfunctioning mass airflow sensor (MAF) can throw off the air-fuel mixture, exacerbating the issue. Lastly, if the idle air control valve (IACV) is dirty or faulty, it may fail to regulate the idle speed effectively, leading to further complications. By identifying and addressing these common causes, you can restore your INFINITI Q60's performance and enjoy a smoother driving experience.

How urgent is it to address the rough idle in my 2018 INFINITI Q60?

Addressing a rough idle in your 2018 INFINITI Q60 is not just a matter of comfort; it is crucial for maintaining the health and efficiency of your vehicle. Ignoring this symptom can lead to serious engine problems, such as misfiring cylinders or fuel system malfunctions, which could result in costly repairs down the line. Additionally, a rough idle often indicates that your engine is not operating at peak efficiency, leading to increased fuel consumption and higher costs at the pump. Moreover, neglecting this issue can contribute to elevated emissions, potentially causing your vehicle to fail emissions tests and harming the environment. Lastly, a rough idle can significantly affect your vehicle's overall performance, including acceleration and driving smoothness, which can compromise your safety on the road. Therefore, it is essential to address a rough idle promptly to avoid further complications and ensure your INFINITI Q60 runs smoothly and efficiently.

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2018 INFINITI Q60 Rough Idle Symptoms & Repair Costs