2019 Ford F-150 Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2019 Ford F-150 and How to Resolve Them

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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 2019 Ford F-150 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 2019 Ford F-150 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 2019 Ford F-150?

To effectively diagnose a rough idle in a 2019 Ford F-150, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by using an OBD-II scanner to identify any error codes that could point to the underlying issue. Next, inspect the spark plugs for signs of wear or fouling, as these can significantly impact engine performance. A clean air filter is essential, so ensure it is free from clogs that could restrict airflow. Additionally, examine the vacuum hoses for any cracks or disconnections that might lead to vacuum leaks, which are common culprits of rough idling. The fuel system should also be assessed, focusing on the fuel filter and injectors to confirm they are delivering fuel properly. Cleaning the throttle body can help eliminate carbon buildup that disrupts airflow, while a smoke test can reveal hidden vacuum leaks. Lastly, check the PCV valve and test the idle air control valve to ensure they are functioning correctly. By following this structured diagnostic approach, you can efficiently identify and resolve the cause of a rough idle in your Ford F-150.

What are the common problems that could cause a rough idle in a 2019 Ford F-150?

When dealing with a rough idle in your 2019 Ford F-150, it's essential to consider several common problems that could be at play. One of the first areas to check is the air filter; a dirty or clogged air filter can significantly restrict airflow to the engine, leading to performance issues. Additionally, inspect the spark plugs, as worn or faulty plugs can cause misfiring, which directly contributes to a rough idle. Another critical component to examine is the vacuum system for any leaks, as these can disrupt the air-fuel mixture essential for smooth engine operation. Fuel system issues, such as clogged fuel filters or injectors, can also hinder performance and should not be overlooked. Furthermore, the mass airflow sensor plays a vital role in regulating the air-fuel mixture, and a malfunction here can lead to rough idling as well. Lastly, consider the EGR valve; if it's faulty, it can negatively impact the combustion process, resulting in an uneven idle. By systematically addressing these potential issues, you can effectively troubleshoot and resolve the rough idle in your F-150, ensuring optimal engine performance.

How urgent is it to address the rough idle in my 2019 Ford F-150?

Addressing a rough idle in your 2019 Ford F-150 is not just a matter of comfort; it is crucial for maintaining the vehicle's overall performance and safety. A rough idle can indicate underlying engine problems, such as issues with the fuel or ignition systems, which, if left unchecked, may lead to decreased fuel efficiency and poor performance. Moreover, ignoring these symptoms can result in more severe engine damage over time, potentially leading to costly repairs that could have been avoided with timely intervention. Regular maintenance and prompt attention to issues like a rough idle are essential for ensuring the longevity and reliability of your truck. Therefore, if you notice your F-150 idling roughly, it is imperative to have it inspected by a qualified mechanic as soon as possible to diagnose and resolve the root cause, safeguarding your vehicle's health and your investment.

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2019 Ford F-150 Rough Idle: Causes & Repair Options