PGM-FI System Description - Fuel Cut-off Control

Recovery engine speed from fuel cut-off during deceleration

After warming up, during deceleration with the throttle valve slightly opened from the fully closed position, the powertrain control module (PCM) stops the fuel injection when the engine speed is over the specified value or more to improve fuel efficiency.

Fuel cut-off at high engine speed

To prevent the engine from the damage, the PCM stops fuel injection when the engine revolution is in the limited area (red zone). However, while stopping the vehicle, the PCM stops fuel injection too. The engine revolution to stop is lower than running condition.

		When the vehicle is running	When the vehicle is stopped
Fuel cut-off at high engine speed	M/T	7,000 rpm	4,800 rpm
Fuel cut-off at high engine speed	CVT	7,000 rpm	4,000 rpm

At High Speed Driving

		High speed driving
Fuel cut-off at high speed driving	USA and Canada models	118 mph (190 km/h) or higher
Fuel cut-off at high speed driving	Mexico models	112 mph (180 km/h) or higher