Boost Cut
The boost cut is designed to prevent engine damage from over-boosting. It has two settings - a cold boost limit and a hot boost limit.
The cold boost cut operates below the cold/hot transition temperature; the hot boost cuts operates above the transition temperature. In this way the engine can be protected from boost when not fully warmed up.
The low and high boost cuts (when hot) are selected based on the low/high boost parameter in Boost Control.
When the boost cut is triggered fuel is immediately cut to the engine, as per the main rev limiter. When either engine speed falls below 2000 rpm or the throttle is released, the rev limiter is removed.
With a stock MAP sensor the maximum level for a boost cut is 10.5 lbs. This must be less than the maximum range of the MAP sensor (~11.3 lbs) so that the MAP sensor is capable of sensing when the manifold pressure exceeds the boost cut limit.
To disable the boost cut set the units to kPa and enter a value of 0 for both hot and cold boost cuts.
Boost cut if check engine code will apply a boost cut for any error condition which illuminates the check engine light.