Check Engine Light and Rough Running

The check engine light covers many systems and components in your European automobile. One reason for this combination of issues happening is direct to the gasoline direct injected engine (GDI). These engines offer the performance of a muscle car with the fuel economy of a mid-sized sedan. As the miles are accumulated, fuel directly injected into the combustion chamber causes a carbon build-up. The direct injection does not allow for the fuel and its detergent additives to clean the intake and exhaust valves. The carbon build-up is the reason for the misfire (rough running engine) and/or excessive cranking when starting the engine. This signals the check engine light illuminate, letting the driver know there is an issue with their engine’s performance. This is a typical problem when these engines reach approximately 30,000 miles.

Preventative Maintenance?

The best prevention is scheduled maintenance. First, full synthetic oil and filter changes every 5,000 miles, with the correctly specified oil, and with a high filtration oil filter. In conjunction with the oil and filter change, a chemical is added to the existing engine oil prior to changing. The engine is idled for about 15 minutes to obtain optimal operating temperature and to allow the chemical to circulate through the engine lubrication system. The oil is then drained, the new oil is installed, an additive is added to the engine oil to help with lubrication and the second additive is added to the fuel tank to help with the cleaning process of the fuel injectors. No more inexpensive oil and filter changes. Fuel injection/fuel induction services will help the injectors continue to spray correctly and will help clean the back side of the intake and exhaust valves. This recommended service should be done ever 15,000 miles or once a year. Compared to the process of cleaning the valves with carbon build-up, it is a minor price to pay every year. This maintenance helps prevent the carbon build-up.

What happens if the Carbon Build-Up Has Occurred?

There are multiple services in which the carbon deposits can be removed and/or maintained. The best solution is preventive maintenance. However, if the engine is experiencing a rough idle, hard to start or a check engine light and more aggressive approach may be needed. This process requires removal of the intake manifold to remove the carbon build-up on the intake and exhaust valves with a media blaster using ground walnut shells. Along with an oil and filter change and a fuel induction and fuel injection service.