Deceleration Fuel Cut-off (Overrun Fuel Cut)
Deceleration fuel cut-off stops fuel injection when the car is coasting in gear with the accelerator released.
What is Deceleration Fuel Cut-off (Overrun Fuel Cut)?
It saves fuel because the engine uses none while coasting in gear. Injection resumes as engine speed approaches idle. It increases engine braking. Electric and hybrid cars use regeneration instead.
How it works
The control unit detects a closed throttle above a certain engine speed and switches off the injectors.
Why it matters for your car
A jerk when fuel resumes can point to a faulty sensor or a worn engine mount. Coasting in neutral usually uses more fuel than coasting in gear.
Other terms
- Blocking Fee (Idle Fee)
- Brake Dust
- Car Subscription
- CHAdeMO Connector
- Diesel Particulate Filter (DPF)
- Gearbox Mount (Transmission Mount)
- Horsepower (Power)
- LPG (Autogas)
- Manufacturer Oil Approval
- Mid-Engine Layout
- Radial Tyre
- Rear Fog Light
- Recovery Points
- Tachometer (Rev Counter)
- Tonneau Cover
- Turbo Lag
- Two-bucket Wash Method
- Type Approval
- Variable Geometry Turbocharger (VGT)
- Wallbox (Home Charger)