2022 Acura RDX Has Rough Idle

Common Causes of Rough Idling in Your 2022 Acura RDX 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 2022 Acura RDX 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 2022 Acura RDX 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 2022 Acura RDX?

To effectively diagnose a rough idle in your 2022 Acura RDX, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by using an OBD-II scanner to identify any error codes that may point to specific engine issues. This initial step can save time and help you focus on the most likely culprits. Next, inspect the spark plugs for signs of wear or fouling, as these can significantly impact engine performance. A clean air filter is also crucial; ensure it is free from dirt and debris to maintain optimal airflow. Following this, examine the vacuum hoses for any cracks or disconnections that could lead to vacuum leaks, which are common causes of rough idling. Don’t overlook the fuel system; check the fuel filter and injectors to ensure they are functioning correctly. Additionally, cleaning the throttle body can improve airflow and engine response. Finally, assess the idle air control valve to confirm it is operating properly. By following this structured diagnostic approach, you can efficiently identify and resolve the issues contributing to a rough idle in your vehicle.

What are the common problems that could cause a rough idle in a 2022 Acura RDX?

When diagnosing a rough idle in a 2022 Acura RDX, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to an uneven idle. Additionally, faulty spark plugs are notorious for causing misfires, which can also contribute to a rough idle. Another potential issue is vacuum leaks; these can disrupt the delicate air-fuel mixture necessary for smooth engine operation. Fuel system problems, such as a clogged fuel filter or a malfunctioning fuel pump, can further exacerbate idle issues by affecting fuel delivery. Moreover, a faulty oxygen sensor can throw off the air-fuel ratio, resulting in performance inconsistencies. Lastly, throttle body issues, including carbon buildup or a malfunctioning throttle position sensor, can lead to irregular idling. By addressing these common problems through regular maintenance and timely repairs, you can help ensure a smoother driving experience in your Acura RDX.

How urgent is it to address the rough idle in a 2022 Acura RDX?

When it comes to a rough idle in your 2022 Acura RDX, addressing the issue promptly is crucial for maintaining your vehicle's performance and safety. A rough idle can indicate underlying engine problems that, if ignored, may escalate into more severe issues, leading to costly repairs. Additionally, neglecting this symptom can result in decreased fuel efficiency, which not only impacts your wallet but also contributes to increased emissions. More importantly, if the rough idle is linked to critical systems, it could pose safety risks while driving. Therefore, while it may not require immediate action like a brake failure, it is essential to diagnose and resolve the rough idle as soon as possible. Regular maintenance and timely attention to any irregularities will help ensure your Acura RDX runs smoothly and efficiently, ultimately prolonging its lifespan and enhancing your driving experience.

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