Chrysler LeBaron Has Rough Idle

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

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Reviewed by
Aisha
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 LeBaron 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 LeBaron 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.

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 LeBaron

When troubleshooting a rough idle in your Chrysler LeBaron, it's crucial to follow a structured diagnostic approach that begins with the simplest solutions before moving on to more complex issues. Start by checking for vacuum leaks, as these are often the primary cause of rough idling. Carefully inspect all vacuum lines and connections for any signs of wear or damage that could lead to air escaping. Next, turn your attention to the spark plugs; if they are worn or fouled, replacing them can significantly improve engine performance. After addressing the spark plugs, examine the ignition coil for any faults, as a malfunctioning coil can disrupt the ignition process and contribute to an unstable idle. If the rough idle persists, test the oxygen sensor, especially if the issue occurs when the vehicle is in park, as a faulty sensor can misinterpret air-fuel ratios. Additionally, inspect the exhaust system for leaks, particularly around the catalytic converter, since these can adversely affect engine performance. Finally, ensure there are no sources of unmetered air entering the engine, which may arise from a dirty airflow sensor or a malfunctioning EGR valve. By systematically addressing these potential issues, you can effectively diagnose and resolve the rough idle in your Chrysler LeBaron, enhancing its overall performance and drivability.

Troubleshooting Rough Idle Issues in a Chrysler LeBaron

When dealing with rough idle issues in a Chrysler LeBaron, it's essential to understand the common problems that may be at play. A vacuum leak is often the primary suspect, as it can disrupt the air-fuel mixture, leading to an unstable idle. Additionally, spark plug issues can cause misfires, contributing to a rough running engine. The ignition coil is another critical component; if it's malfunctioning, it can fail to deliver the necessary spark for smooth operation. Another factor to consider is the choke operation; if the choke does not function correctly after the engine warms up, it may cause the engine to idle too low and rough, potentially producing black smoke. A dirty throttle body can also impede airflow, making it difficult for the engine to maintain a steady idle, so cleaning it can be a beneficial step. Furthermore, the Idle Air Control motor, particularly in older models, may struggle to adjust to changes in idle speed, leading to roughness. Lastly, inspecting hoses for leaks or blockages can be a straightforward DIY task; pinching off hoses or spraying water on them while the engine runs can help identify problematic areas. By systematically addressing these common issues, you can effectively troubleshoot and resolve rough idle problems in your Chrysler LeBaron.

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

When your Chrysler LeBaron is idling rough, it’s essential to act promptly, as ignoring this symptom can lead to more severe engine problems and safety risks. A rough idle often indicates that the engine is struggling to maintain a consistent combustion process, which could stem from issues like vacuum leaks, faulty spark plugs, or malfunctioning ignition coils. If left unaddressed, these problems can escalate, potentially resulting in engine stalling or failure, which poses a significant safety hazard while driving. To effectively troubleshoot the issue, start by inspecting for any visible vacuum leaks or listening for hissing sounds under the hood, as these can be telltale signs of air leaks. Additionally, checking the condition of the spark plugs and air filter can help identify other underlying issues. If the rough idling persists, it may be wise to consult a professional for a thorough diagnosis to prevent further damage and ensure your vehicle remains safe and reliable on the road.

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Chrysler LeBaron Rough Idle: Causes & Repair Costs