2019 Nissan GT-R Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2019 Nissan GT-R and How to Restore Smooth Performance

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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 Nissan GT-R 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 Nissan GT-R 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 2019 Nissan GT-R?

To effectively diagnose a rough idle in your 2019 Nissan GT-R, 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 fault codes, as these can quickly point you to underlying issues. Next, inspect the spark plugs for wear or fouling, as these are critical for proper engine performance. A clean air filter is essential for optimal airflow, so check its condition and replace it if necessary. Don’t overlook the vacuum hoses; any cracks or disconnections can lead to significant idle problems, so ensure they are intact. The fuel system also plays a vital role, so examine the fuel filter and injectors for clogs, cleaning or replacing them as needed. Additionally, a thorough cleaning of the throttle body can help restore smooth operation. Finally, conduct a meticulous inspection for any vacuum leaks in the intake system, as these can disrupt the air-fuel mixture and exacerbate idle issues. By following this structured diagnostic approach, you can effectively identify and resolve the causes of rough idling, ensuring your GT-R runs smoothly.

What are the common problems that could cause a rough idle in a 2019 Nissan GT-R?

When dealing with a rough idle in your 2019 Nissan GT-R, 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, which can also contribute to a rough idle. Another issue to investigate is the presence of vacuum leaks; these can disrupt the air-fuel mixture, resulting in instability during idling. Fuel system problems, such as a clogged fuel filter or malfunctioning fuel injectors, can further exacerbate the situation by hindering proper fuel delivery. Moreover, a malfunctioning throttle body can impede the necessary air intake, causing irregular idling. Lastly, don't overlook the potential for engine control module (ECM) issues, as sensor malfunctions or software glitches can disrupt overall engine performance. By understanding these common problems, you can take proactive steps in diagnosing and addressing the rough idle in your GT-R, ensuring a smoother driving experience.

How urgent is it to address the rough idle in a 2019 Nissan GT-R?

Addressing a rough idle in your 2019 Nissan GT-R should be treated with a sense of urgency, as neglecting this issue can lead to more severe engine problems and decreased performance. A rough idle often indicates underlying issues, such as fuel delivery problems, ignition system failures, or vacuum leaks, which can progressively worsen if not resolved. This not only affects your vehicle's fuel efficiency but can also result in costly repairs down the line. For DIY enthusiasts, it’s crucial to regularly monitor your vehicle's performance and conduct basic diagnostics, such as checking for error codes or inspecting spark plugs and air filters. By taking prompt action, you can maintain the health of your GT-R, ensuring it runs smoothly and efficiently for years to come. Remember, while it may not seem like an immediate emergency, addressing a rough idle sooner rather than later can save you from significant headaches and expenses in the future.

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Diagnosing Rough Idle Issues in 2019 Nissan GT-R | RepairPal