2016 Chevrolet Spark Has Rough Idle

Common Causes of Rough Idling in Your 2016 Chevrolet Spark 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 2016 Chevrolet Spark 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 Chevrolet Spark 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.

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.

What are the initial diagnostic steps to take for a rough idle in a 2016 Chevrolet Spark?

When faced with a rough idle in your 2016 Chevrolet Spark, it's essential to adopt a methodical diagnostic approach to identify and resolve the issue effectively. Start by checking for fault codes using an OBD-II scanner, as these codes can reveal specific problems within the engine's systems. Next, inspect the spark plugs; worn or fouled plugs are common culprits of misfires that lead to rough idling, so replacing them may be necessary. Don't overlook the air filter; a clogged filter can restrict airflow, negatively impacting engine performance. Additionally, examine the vacuum hoses for leaks, as any disruption in the air-fuel mixture can cause instability in idle. The throttle body should also be inspected for carbon buildup, which can hinder its function; cleaning it can often restore smoother operation. Lastly, ensure the fuel system is in good working order by checking the fuel filter, injectors, and pump. By following these steps, you can systematically diagnose and address the rough idle issue, enhancing your vehicle's performance and reliability.

What are the common problems that could cause a rough idle in a 2016 Chevrolet Spark?

When diagnosing a rough idle in a 2016 Chevrolet Spark, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to an uneven idle. Additionally, faulty spark plugs are notorious for causing misfires; if they are worn out, they can disrupt the combustion process and result in a rough idle. Another potential issue is vacuum leaks, which can disturb the air-fuel mixture necessary for smooth engine operation. Problems within the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump, can also impact engine performance and contribute to rough idling. Furthermore, a malfunctioning mass airflow sensor can throw off the air-fuel balance, exacerbating the issue. Lastly, don't overlook the EGR (Exhaust Gas Recirculation) valve; if it's faulty, it can interfere with the combustion process, leading to a rough idle. Addressing these issues promptly is essential for maintaining optimal vehicle performance and preventing further damage.

How urgent is it to address the rough idle in my 2016 Chevrolet Spark?

Addressing a rough idle in your 2016 Chevrolet Spark is crucial for maintaining the vehicle's performance and longevity. Ignoring this symptom can lead to a cascade of problems, including decreased fuel efficiency and engine misfires, which not only affect your driving experience but can also result in costly repairs down the line. A rough idle often indicates underlying issues such as faulty spark plugs, fuel system malfunctions, or air intake problems that, if left unresolved, may escalate into more serious engine damage. Moreover, the longer you wait to address these symptoms, the more likely you are to face safety risks while driving. Regular maintenance and prompt repairs are essential to prevent further complications, ensuring that your Spark remains reliable and efficient. Therefore, it is advisable to take immediate action to diagnose and resolve the rough idle, safeguarding both your vehicle's health and your safety on the road.

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Troubleshooting Rough Idle in 2016 Chevrolet Spark