Let’s “turn up the heat” with an overview of GDI’s closely-connected:1. Fuel injectors2. Combustion chambersIn gasoline direct injection (GDI) engines, gasoline injector tips are directly exposed to combustion chamber heat, pressure and contaminants. As a result, according to VehicleMD, GDI fuel injector deposits are similar to combustion chamber carbon deposits. Meaning they’re harder, more tenacious, more difficult to remove and more benefitting from preventive maintenance.In the past, techs were familiar with port fuel injection (PFI) where fuel injectors, located in lower-temperature intake runners, sprayed gasoline at 40–60 pounds per square inch during the relatively lengthy period of intake valve
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