2023 Acura TLX Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2023 Acura TLX and How to Resolve Them

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Reviewed by
Bo Fader
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 2023 Acura TLX 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 2023 Acura TLX 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 initial diagnostic steps to take for a rough idle in a 2023 Acura TLX?

When faced with a rough idle in your 2023 Acura TLX, it's essential to adopt a systematic diagnostic approach to identify the root cause effectively. Start by checking the spark plugs, as worn or dirty plugs can significantly impact engine performance. Next, inspect the air filter; a clogged filter can restrict airflow, leading to an uneven idle. Following this, examine the fuel system, including the fuel filter and injectors, to ensure they are functioning correctly. Utilizing an OBD-II scanner can provide valuable insights by revealing any error codes that may indicate specific issues. Additionally, inspect the vacuum hoses for any cracks or leaks, as these can disrupt the air-fuel mixture. Finally, take a look at the throttle body for any carbon buildup or operational issues. By methodically addressing these areas, you can effectively diagnose and potentially resolve the rough idle in your Acura TLX, making it a rewarding DIY project.

What are the common problems that could cause a rough idle in a 2023 Acura TLX?

When dealing with a rough idle in your 2023 Acura TLX, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the first areas to check is the air filter; a dirty or clogged air filter can significantly restrict airflow to the engine, leading to an uneven idle. Additionally, inspect the spark plugs, as worn or faulty plugs can cause misfiring, which directly contributes to a rough idle. Another critical component to examine is the vacuum system; any leaks can disrupt the air-fuel mixture, resulting in instability during idling. Fuel system issues, such as a clogged fuel filter or a malfunctioning fuel pump, can also impact engine performance and should not be overlooked. Furthermore, a faulty oxygen sensor can alter the air-fuel ratio, exacerbating idle problems, while issues with the mass airflow sensor can disrupt the engine's air intake calculations. By addressing these common issues through regular maintenance and timely repairs, you can improve your Acura TLX's idle performance. If the problem persists despite your efforts, seeking assistance from a qualified mechanic is advisable for a comprehensive diagnosis and repair.

How urgent is it to address the rough idle in a 2023 Acura TLX?

Addressing a rough idle in your 2023 Acura TLX is crucial for maintaining the vehicle's performance and safety. A rough idle can indicate underlying engine problems, such as faulty spark plugs, fuel system malfunctions, or air intake issues, which, if left unattended, may lead to more severe complications. Ignoring these symptoms can result in decreased fuel efficiency, engine misfires, and even significant damage to engine components over time. Moreover, a rough idle may signal serious issues that require immediate attention to prevent further deterioration of your vehicle's condition. Regular maintenance and prompt action in response to these symptoms not only enhance the longevity of your Acura TLX but also ensure a smoother and safer driving experience. Therefore, it is essential to prioritize addressing a rough idle to avoid escalating problems and to keep your vehicle operating optimally.

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2023 Acura TLX Rough Idle: Causes & Repairs | RepairPal