Fuel Cutoff Control

During deceleration with the throttle valve closed, current to the injectors is cut off to improve fuel economy at engine speeds over 650 rpm. Fuel cutoff control also occurs when the engine speed exceeds 6,300 rpm, regardless of the position of the throttle valve, to protect the engine from over-revving. When the vehicle is stopped, the PCM cuts the fuel at engine speeds over 4,500 rpm. On a cold engine, fuel cut occurs at a lower engine speed.