2015 Ford Police Interceptor Sedan Has Rough Idle

Causes of Rough Idle in 2015 Ford Police Interceptor Sedan and Solutions for Smooth Operation

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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 2015 Ford Police Interceptor Sedan 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 2015 Ford Police Interceptor Sedan 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 initial diagnostic steps to take for a rough idle in a 2015 Ford Police Interceptor Sedan?

When addressing a rough idle in your 2015 Ford Police Interceptor Sedan, it's essential to adopt a methodical diagnostic approach. Begin by checking for vacuum leaks, as these can significantly affect engine performance. Inspect all vacuum hoses and connections for any signs of wear or damage, as even a small leak can lead to a rough idle. Next, turn your attention to the spark plugs; worn or fouled plugs can disrupt the combustion process, so examine their condition and replace them if they show signs of deterioration. Following this, test the ignition coil to ensure it is functioning properly, as a faulty coil can also contribute to an unstable idle. If these initial checks do not resolve the issue, consider other potential causes such as fuel delivery problems or sensor malfunctions, which may require further investigation. By systematically addressing these areas, you can effectively diagnose and potentially resolve the rough idle issue in your vehicle.

What are the common causes of a rough idle in a 2015 Ford Police Interceptor Sedan?

When dealing with a rough idle in a 2015 Ford Police Interceptor Sedan, it's crucial to consider several common problems that could be affecting the vehicle's performance. One of the primary culprits is a vacuum leak, which can disrupt the air-fuel mixture and lead to unstable engine behavior. Additionally, worn or faulty spark plugs can cause misfires, resulting in a rough idle as the engine struggles to maintain a consistent rhythm. The ignition coil is another critical component; if it malfunctions, it can prevent the spark plugs from firing correctly, further exacerbating idle issues. The ignition control module also plays a vital role in managing the ignition system, and any defects here can lead to erratic engine performance. Lastly, a defective airflow sensor can misread the amount of air entering the engine, causing improper fuel delivery and contributing to a rough idle. By understanding these potential issues, DIYers can systematically diagnose and address the root causes of a rough idle, ensuring their Ford Police Interceptor Sedan runs smoothly.

How urgent is it to address the rough idle in a 2015 Ford Police Interceptor Sedan?

Addressing a rough idle in a 2015 Ford Police Interceptor Sedan is not just a matter of convenience; it is a critical safety and performance concern that demands immediate attention. A rough idle can signal serious underlying engine problems that, if ignored, may escalate into more significant mechanical failures, potentially leaving officers stranded during crucial moments. Moreover, a vehicle that operates inefficiently can lead to increased fuel consumption, which is particularly detrimental in a law enforcement setting where every second counts and operational costs are closely monitored. The urgency to resolve this issue is further amplified by the need for reliability in high-stakes situations; a vehicle that hesitates or stutters can compromise an officer's ability to respond effectively. Therefore, it is essential to prioritize the diagnosis and repair of a rough idle to ensure the vehicle remains in optimal condition, safeguarding both the officers and the community they serve.

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2015 Ford Police Interceptor Sedan Rough Idle | RepairPal