Gasoline Direct Injection Now Available April 23, 2012 Learn the latest in gasoline direct injection service and fuel trim data analysis with AVI instructor Bill Fulton in the new Gasoline Direct Injection Diagnostics class Now Available from AVI. 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: knowledge of theory, fundamentals and service procedures are yet another tool you will soon need to have in your toolbox of knowledge. 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!