In recent years, auto manufacturers have been introducing gasoline direct injection (GDI) systems paired with turbo-charging, which enables them to downsize engines and increase fuel economy without sacriﬁcing performance. While most fuel-injected engines use indirect fuel injection that premixes the fuel and air in the intake manifold, direct injection also has air ﬂowing into the cylinder from the intake manifold, but the fuel is sprayed into the cylinder separately. As beneﬁcial as GDI systems are, they are showing drivability issues related to carbon buildup on the intake valves, which results in hard starting and random misﬁre codes. This is caused by fuel’s failure to spray on the backside of the valves, where the detergents can work to remove deposit buildup. Get the maximum reliability and safety from the car you rely on daily by inspecting parts routinely and replacing them before they fail. We will treat you like a friend and your car like it was one of our own. One of our ASE Certiﬁed Technicians can inspect the various components of the vehicle, including the valves, belts and hoses, brake ﬂuid, pads, and shoes.
HINT: The above-mentioned deposit buildup associated with gasoline direct injection systems can be corrected with a thorough cleaning of the intake manifold and intake valves.