2016 Buick Encore Has Rough Idle

Diagnosing Causes of Rough Idle in Your 2016 Buick Encore and Solutions for a Smoother Ride

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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 2016 Buick Encore 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 2016 Buick Encore 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 2016 Buick Encore?

To effectively diagnose a rough idle in your 2016 Buick Encore, it's essential to adopt a systematic approach that begins with simpler checks before progressing to more complex diagnostics. Start by utilizing an OBD-II scanner to retrieve any error codes, as these can quickly highlight potential issues within the engine. Next, inspect the air filter; a dirty or clogged filter can severely restrict airflow, contributing to idle problems. After ensuring the air filter is clean, examine the spark plugs for signs of wear or fouling, as these components play a critical role in engine performance. If the spark plugs appear to be in good condition, shift your focus to the fuel system, checking for clogs in the fuel filter or malfunctions in the fuel injectors. Additionally, inspect the vacuum hoses for any leaks or cracks, as these can disrupt the air-fuel mixture and worsen idle issues. Cleaning the throttle body is also crucial, as a buildup of dirt can affect idle speed. Finally, conduct a thorough inspection for any vacuum leaks, as these can lead to significant performance problems. By following this structured diagnostic approach, you can efficiently identify and resolve the causes of a rough idle in your vehicle.

What are the common causes of a rough idle in a 2016 Buick Encore?

When dealing with a rough idle in your 2016 Buick Encore, it's essential to understand the common problems that could be at play. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to performance issues. Additionally, faulty spark plugs are notorious for causing misfires, which can manifest as a rough idle. Another potential issue is vacuum leaks; these can disrupt the delicate balance of the air-fuel mixture, resulting in an unstable idle. Fuel system problems, such as clogged fuel filters or injectors, can also hinder engine performance and contribute to rough idling. Furthermore, a malfunctioning oxygen sensor can throw off the air-fuel ratio, exacerbating the issue. Lastly, don't overlook the ignition system; components like ignition coils or distributors can fail and lead to similar symptoms. By regularly maintaining these systems and addressing any issues promptly, you can help ensure a smoother idle and overall better performance from your Buick Encore.

How urgent is it to address the rough idle in my 2016 Buick Encore?

Addressing a rough idle in your 2016 Buick Encore is not just a matter of comfort; it is crucial for the vehicle's overall performance and longevity. A rough idle can indicate serious underlying issues, such as faulty spark plugs, fuel system malfunctions, or air intake problems. Ignoring these symptoms can lead to decreased fuel efficiency and may escalate into more severe engine damage or even stalling, which poses safety risks on the road. By taking prompt action, you can prevent costly repairs and ensure that your vehicle operates smoothly. Regular maintenance and timely interventions are key to avoiding complications, making it essential to prioritize addressing a rough idle as soon as it is detected.

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