Coming Soon: Gasoline Direct Injection April 9, 2012 Gasoline Direct Injection offers a 15-20% increase in fuel economy, a 40% reduction in emissions, and a major increase in volumetric efficiency of the engine. Learn the latest in fuel trim data analysis with AVI instructor Bill Fulton in the soon-to-be-released Gasoline Direct Injection Diagnostics class from AVI. Bill covers the 5 operating modes of GDI, bi-directional controls, and critical labscope signals, as well as problems that can occur over time that you will need to service. Discover the differences between PFI (Port Fuel Injection) and GDI systems, and get an inside look with drivability case studies. Also covered: Comparing PDI and GDI Low and High Side Components GDI Lack of Power Complaints Current Flow Demands from the Fuel Pump and much more!