Before we go into the symptoms there is a high probability that it may be time for a Carbon Valve Cleaning. Here are the main symptoms our clients have experienced over the years. Established in 2013, I’d say our service department has done their “fair share” of cleanings 🙂

1. Decreased Engine Performance

• If you notice your BMW feels sluggish, lacks power, or doesn’t accelerate as it used to, carbon buildup could be restricting airflow, reducing engine performance.

2. Poor Fuel Efficiency

• A drop in fuel economy is often a sign of dirty intake valves. The engine has to work harder to compensate for the reduced airflow, leading to increased fuel consumption.

3. Rough Idle

• Carbon buildup can cause the engine to idle roughly or unevenly. If your BMW shakes or vibrates while idling, this could be a sign that the valves are clogged with carbon deposits.

4. Check Engine Light

• A check engine light can be triggered by many factors, including carbon buildup that leads to misfires or inefficient combustion. The light may indicate an issue related to airflow, fuel mixture, or misfires that are caused by dirty valves.

5. Misfires or Hesitation

• Misfires during acceleration or hesitation when you press the gas pedal are common symptoms of excessive carbon buildup. This happens when the fuel-air mixture is disrupted due to restricted airflow.

6. Reduced Throttle Response

• If the engine doesn’t respond as quickly when you press the gas pedal, the issue could be related to carbon deposits on the intake valves that are blocking air from entering the combustion chamber.

7. Frequent Cold Start Issues

• Carbon buildup can make cold starts difficult. If your car struggles to start when cold or takes longer than usual to crank, it may be due to dirty intake valves.

8. Engine Knocking or Pinging

• In severe cases, carbon buildup can cause knocking or pinging sounds during acceleration. This is because the buildup affects the engine’s combustion timing.

When to Check for Carbon Buildup

• Mileage: Although Carbon buildup typically starts becoming significant after 30,000 to 60,000 miles, it is something that needs to be addressed at all mileage depending on driving conditions and engine type.
• Type of Driving: Short trips, stop-and-go driving, and frequent idling can accelerate carbon buildup compared to highway driving.

If you’re experiencing any of these symptoms, there’s a good chance your EURO is suffering from carbon buildup on the intake valves. But don’t worry — our professional carbon valve blasting service can restore your BMW, Audi, or Volkswagen’s performance and have it running like new again. Contact us to schedule your appointment today!