Advanced engine performance Exam With 100% Correct Answers | Already Passed| Graded A+

The high-pressure fuel pump used in gasoline direct injection (GDI) systems is powered by ________. - The camshaft The high-pressure fuel pressure is regulated by using ________. - An electric pressure control valve The fuel injectors used on a gasoline direct injection system are pulsed on using what voltage? - 50V to 90V Which mode of operation results in a richer air-fuel mixture near the spark plug? - Stratified GDI-equipped engines have a higher efficiency due to a ________ compression ratio. - higher An engine equipped with GDI may have up to a ________ percent improvement in fuel economy. - 25 The use of an electronic control (ETC) system allows the elimination of all of the following EXCEPT ________. - Accelerator pedal The throttle plate is spring-loaded to hold the throttle slightly open how far? - 16% to 20% The throttle plate actuator motor is what type of electric motor? - DC Motor The throttle body may be cleaned (if recommended by the vehicle manufacturer) if what conditions are occurring? - Lower-than-normal idle speed Coast-down stall