Direct injection engines are a mainstay in most modern BMW and Audi vehicles. This design feature results in increased fuel efficiency and lower emissions. However, such mechanisms are not without their flaws. Carbon buildup in direct injection engines is a common problem.
How Carbon Buildup Damages Direct Injection Engines
As suggested in its name, fuel is injected directly into the engine cylinder. As you rack up the miles, the fuel burns and carbon accumulates. The problem with direct injection is that it doesn’t allow for detergent additives in the fuel to clean the valve. Carbon buildup then results in engine misfires, which may cause the check engine light to come on.
Carbon accumulation is especially common once the vehicle reaches the 30,000 to 60,000 mile mark.
How to Detect Carbon Buildup
Other signs may manifest besides engine misfiring and the check engine light’s switching on. You may also notice engine vibration that you can feel throughout the cabin. The vehicle may also jerk or surge at stops. If you have access to a scan tool, the device may show misfire codes and yield unusual fuel trim numbers.
How to Solve the Problem of Carbon Buildup
You should arrange for a fuel injector cleaning. For BMW vehicles, do this every 30,000-miles or every two years. For Audi and VW cars, do this every 15,000-miles or every year.
We also recommend scheduling an appointment for a synthetic oil change every 5,000 miles. You should also replace the spark plug at the interval according to the vehicle manual. A worn spark plug causes unburned fuel to accumulate in the chambers, causing the valves to stick.
We Service Direct Injection Engines
While you can schedule a direct injection engine cleaning at the dealerships, we recommend bringing your vehicle to Northwest Imports. We are an independent shop that removes carbon buildup from direct injection engines at a fraction of the price.
Direct Injection Engine Servicing
Serving Customers in Austin, Pflugerville, Round Rock, Cedar Park, Wells Branch, Liberty Hill, Jollyville and Anderson Mill