FUEL Cutoff

The manufacturers have provided overrun cut-off for newer models in order to save fuel when overrun by cutting off the fuel supply for a short time. One speaks of overrun when the vehicle is driven with the remaining momentum by the weight and does not require any fuel - when driving downhill, for example.

WHAT HAPPENS WHEN THE FUEL cutoff IS DISABLED

The fuel cut-off is not deactivated directly, but delayed.

  • As a result, the fuel supply is maintained longer and ignited later.
  • This delay in fuel cut-off is also referred to as an anti-lag system in racing and is used to maintain the boost pressure of the turbocharger.
  • The fuel is then no longer ignited only in the cylinder, but further back: in the manifold or in the catalytic converter.
  • The delayed ignition then results in the well-known “pop” or bubble when the accelerator pedal is released.

DEACTIVATE FUEL cutoff breaks the engine

Because the fuel supply is not interrupted, as the name suggests, but delayed, the deactivation of the overrun fuel cut-off means additional stress and damage to the engine and all components due to the high temperatures - valves, turbochargers and catalytic converters suffer from the ignition, which actually does not belong there.

According to our philosophy, a good tuning is a noticeable increase in performance without having to worry much more (insignificant additional burden, legal aspects such as noise reduction). Fuel cut-off clearly causes damage and causes more noise and is therefore not in line with our philosophy.

ChipTuningPower therefore does not offer any program changes that cause damage and additional noise through misfires. Under certain circumstances, the bubbling can occur due to chip tuning even without fuel cutoff.