2022 Toyota GR Supra Has Rough Idle

Diagnosing the Causes of Rough Idle in Your 2022 Toyota GR Supra and How to Resolve Them

Find Repair Location
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 2022 Toyota GR Supra 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 2022 Toyota GR Supra 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 2022 Toyota GR Supra?

When diagnosing a rough idle in a 2022 Toyota GR Supra, it's crucial to follow a methodical approach that begins with the simplest checks and progresses to more complex diagnostics. Start by utilizing a diagnostic scanner to identify any fault codes, as these can quickly point to underlying issues. Next, inspect the spark plugs for signs of wear or fouling, since they are essential for optimal engine performance. Ensure the air filter is clean and unobstructed, as a dirty filter can restrict airflow and impact idle quality. After that, check for vacuum leaks by examining hoses and connections, as even minor leaks can disrupt engine operation. The fuel system is another critical area; inspect the fuel filter and injectors for any signs of malfunction that could contribute to the rough idle. Additionally, take a look at the throttle body for carbon buildup, which can interfere with airflow. If the problem persists, performing a compression test can help identify any issues related to low engine compression. Lastly, verify that the idle air control valve is functioning properly, as it plays a key role in regulating airflow at idle. By systematically addressing these areas, you can effectively diagnose and resolve the rough idle issue, ultimately improving your vehicle's performance.

What are the common problems that could cause a rough idle in a 2022 Toyota GR Supra?

When diagnosing a rough idle in a 2022 Toyota GR Supra, it's essential to consider several common problems that could be affecting engine performance. One of the primary culprits is dirty or clogged air filters, 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 result in a rough idle. Another potential issue is vacuum leaks; these leaks can disrupt the delicate balance of the air-fuel mixture, further contributing to idle instability. Fuel system problems, such as clogged fuel filters or malfunctioning fuel injectors, can impede fuel delivery, impacting overall engine performance. Ignition system issues, including a malfunctioning ignition coil, may also play a role in rough idling. Lastly, a malfunctioning throttle body can disrupt airflow, exacerbating idle quality problems. By addressing these common issues through regular maintenance and timely repairs, you can help ensure a smoother idle and optimal performance for your GR Supra.

How urgent is it to address the rough idle in my 2022 Toyota GR Supra?

Addressing a rough idle in your 2022 Toyota GR Supra is crucial for both safety and performance. Ignoring this symptom can lead to a cascade of problems, including decreased fuel efficiency and potential damage to engine components, which may escalate into more severe issues over time. A rough idle often indicates underlying engine problems that, if left unchecked, could compromise critical systems and pose safety risks while driving. Moreover, timely repairs not only enhance your vehicle's performance but also prevent costly repairs in the future. Therefore, it is essential to prioritize this issue and take action as soon as possible to ensure your Supra operates smoothly and efficiently.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.