2023 Ford Bronco Sport Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2023 Ford Bronco Sport 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 Ford Bronco Sport has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: A worn or fouled spark plug can cause misfires, rough idling, and decreased fuel efficiency due to incomplete combustion.
  • 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 Ford Bronco Sport 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 2023 Ford Bronco Sport?

To effectively diagnose a rough idle in your 2023 Ford Bronco Sport, start by checking for a vacuum leak, as this is a common culprit that can significantly affect engine performance. Next, inspect the spark plugs for wear or damage, since faulty spark plugs can lead to misfires and contribute to an unstable idle. Following this, examine the ignition coil for any signs of malfunction, as issues here can disrupt the ignition process. It’s also essential to clean or replace the Idle Air Control (IAC) valve, since a dirty or failing IAC can cause erratic idling. Additionally, verify the functionality of the Exhaust Gas Recirculation (EGR) valve, as a stuck open EGR can create symptoms similar to a vacuum leak. Finally, monitor the idle speed for any fluctuations or unusual behavior, as these can indicate deeper issues that may require further investigation. By systematically addressing these components, you can effectively diagnose and resolve the rough idle issue in your vehicle.

What are the common problems that could cause a rough idle in a 2023 Ford Bronco Sport?

When dealing with a rough idle in your 2023 Ford Bronco Sport, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the primary culprits is vacuum leaks, which can disrupt the air-fuel mixture and lead to an unstable idle. Additionally, spark plug issues are another frequent cause; worn or faulty spark plugs can misfire, resulting in a rough engine operation. Ignition coil problems may also contribute to this issue, as a malfunctioning coil can prevent the spark plugs from firing correctly. Another area to inspect is the idle control valve or throttle plate, as blockages or malfunctions here can hinder the engine's ability to maintain a steady idle. Lastly, if your Bronco Sport is equipped with the 2.7L EcoBoost engine, be vigilant for any specific engine issues that have been reported by other owners. By systematically checking these components, you can effectively diagnose and address the rough idle problem in your vehicle.

How urgent is it to address the rough idle in a 2023 Ford Bronco Sport?

Addressing a rough idle in your 2023 Ford Bronco Sport should be treated with a sense of urgency, as neglecting this issue can lead to more significant problems down the line. A rough idle often signals underlying mechanical issues, such as a vacuum leak or faulty spark plugs, which, if left unresolved, can compromise your vehicle's performance and fuel efficiency. Moreover, persistent rough idling can escalate into drivability concerns, including stalling or misfiring, which not only affect your driving experience but can also lead to costly repairs. For DIY enthusiasts, it’s crucial to regularly monitor your vehicle's performance and address any irregularities promptly. By doing so, you can prevent minor issues from developing into major repairs, ensuring your Bronco Sport remains reliable and efficient. If you notice the rough idle persists or is accompanied by other symptoms, it’s advisable to consult a qualified mechanic for a thorough diagnosis, as this can save you time and money in the long run.

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2023 Ford Bronco Sport Rough Idle: Causes & Solutions