2013 Acura TSX Has Rough Idle

Common Causes of Rough Idling in Your 2013 Acura TSX and How to Resolve Them

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Reviewed by
Devin Cabugcal
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 Acura TSX 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 2013 Acura TSX 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 2013 Acura TSX?

To effectively diagnose a rough idle in your 2013 Acura TSX, it's essential to adopt a methodical approach that begins with simpler checks before progressing to more complex diagnostics. Start by utilizing an OBD-II scanner to retrieve any error codes that may indicate the root cause of the rough idle. Following this, inspect the spark plugs for any signs of wear or fouling, as these can significantly impact engine performance. A clean air filter is vital for ensuring proper airflow, so assess its condition and replace it if it appears dirty or clogged. Additionally, examine the vacuum hoses for any cracks or disconnections that could lead to vacuum leaks, which can disrupt engine idle. It's also important to check the fuel system for proper functionality by inspecting the fuel filter, injectors, and pressure. Cleaning the throttle body can help remove carbon buildup that may hinder airflow. If needed, perform a smoke test to identify any vacuum leaks in the intake system. Lastly, test the idle air control valve to ensure it is effectively regulating idle speed, and verify engine compression levels to rule out any internal engine issues. By following this structured diagnostic approach, you can systematically identify and resolve the rough idle issue in your Acura TSX.

What are the common causes of a rough idle in a 2013 Acura TSX?

When dealing with a rough idle in your 2013 Acura TSX, it's essential to understand the common problems that could be at play. One of the first areas to check is the air filter; a dirty or clogged filter can significantly restrict airflow to the engine, leading to performance issues. Next, inspect the spark plugs, as worn or faulty plugs can cause misfiring, which directly contributes to a rough idle. Additionally, be on the lookout for vacuum leaks, as these can disrupt the air-fuel mixture, further exacerbating the problem. Fuel system issues, such as clogged fuel filters or injectors, can also impact engine performance, so ensure these components are clean and functioning properly. Don't overlook the oxygen sensor, as a malfunction here can alter the air-fuel ratio, resulting in an unstable idle. Lastly, consider the ignition system; problems with components like the ignition coil or distributor can lead to similar rough idling symptoms. By systematically addressing these common issues, you can effectively diagnose and resolve the rough idle in your Acura TSX, ensuring smoother engine performance.

How urgent is it to address the rough idle in a 2013 Acura TSX?

Addressing a rough idle in your 2013 Acura TSX should be considered a priority, as neglecting this symptom can lead to a cascade of more serious problems. A rough idle often indicates underlying engine issues, such as faulty spark plugs, fuel system malfunctions, or air intake problems, which, if left unresolved, can result in decreased fuel efficiency and engine misfires. Over time, these issues can escalate, potentially causing significant damage to critical engine components, leading to costly repairs. Moreover, a rough idle can sometimes signal more severe problems that may require immediate attention to avoid further complications. Regular maintenance and prompt diagnosis of such symptoms are essential not only for the vehicle's performance but also for your safety on the road. Therefore, it is crucial to address a rough idle as soon as it is noticed to ensure the longevity and reliability of your Acura TSX.

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