Chrysler Cirrus Has Rough Idle

Diagnosing Causes of Rough Idle in Your Chrysler Cirrus and How to Restore Smooth Performance

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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 Chrysler Cirrus 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 Chrysler Cirrus 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.

Customers with drum brake systems often specify they have lost braking power, or that the vehicle's brakes are making noise. This is because brake drums do not dissipate heat very well, so the heat from hard braking will cause stress fractures. These fractures make can make noise on the brake shoes as the drum revolves around the shoes. Lastly, the brake shoes may not be problematic, but may cause a grinding noise while stopping. This would indicate the shoes have no braking material left, and the brake shoes must be changed before the vehicle can be safely driven.

Learn more about brake shoe symptoms

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.

Troubleshooting Rough Idle in a Chrysler Cirrus

When troubleshooting a rough idle in your Chrysler Cirrus, it's essential to adopt a systematic diagnostic approach. Begin by checking for simple issues such as vacuum leaks, which can often be identified by inspecting hoses and connections for cracks or disconnections. Next, examine the spark plugs and ignition coils, as worn or faulty components can lead to misfires and irregular idling. If these basic checks do not resolve the problem, consider the condition of the air filter; a clogged filter can restrict airflow and affect engine performance. Additionally, utilize an OBD-II scanner to check for any diagnostic trouble codes that may indicate sensor failures or other underlying issues. By starting with these straightforward assessments, you can efficiently narrow down the potential causes of the rough idle before delving into more complex diagnostics, ultimately saving time and effort in your DIY repair process.

Troubleshooting Rough Idle Issues in a Chrysler Cirrus

When dealing with rough idle issues in a Chrysler Cirrus, it's essential to understand the common problems that may arise within the vehicle's systems. One frequent culprit is vacuum leaks, which can disrupt the air-fuel mixture and lead to unstable engine performance. Inspecting the vacuum hoses for cracks or disconnections is a crucial first step. Additionally, the air intake system should be examined; a clogged air filter or obstructions can significantly hinder airflow, exacerbating idle issues. The fuel system also plays a vital role; a clogged fuel filter or malfunctioning fuel injectors can prevent the engine from receiving the proper fuel supply, resulting in rough idling. Spark plugs are another common area of concern; worn or faulty plugs can misfire, causing uneven engine operation. Furthermore, the ignition system, including coils and wires, should be checked for wear, as any damage here can impact performance. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into underlying issues, while the idle air control valve, which regulates airflow at idle, may require cleaning or replacement if it is malfunctioning. By systematically addressing these common problems, DIYers can effectively troubleshoot and resolve rough idle issues in their Chrysler Cirrus.

Why is My Chrysler Cirrus Idling Rough and What Should I Do?

When your Chrysler Cirrus is idling rough, it’s crucial to address the issue promptly to avoid further complications that could compromise your vehicle's performance and safety. Ignoring symptoms like rough idling can lead to more severe problems, such as engine misfires or stalling, which not only affect drivability but can also result in costly repairs down the line. For instance, a vacuum leak can disrupt the air-fuel mixture, leading to inefficient combustion and potential engine damage if left unchecked. Similarly, worn spark plugs or a failing ignition coil can cause misfires, which may escalate into more significant engine issues. Additionally, a malfunctioning EGR valve or clogged air filter can hinder engine efficiency, resulting in poor fuel economy and increased emissions. Therefore, it’s essential to conduct regular inspections and address any signs of rough idling immediately. By taking these proactive steps, you can ensure your Chrysler Cirrus remains in optimal condition, enhancing both its longevity and your driving experience.

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Chrysler Cirrus Rough Idle Causes & Common Repairs