The higher pressure might mean more fuel squirts in for a given injector open pulse but the lambda sensor will sense the richer mixture and will edit the overlay map to reduce the pulse time, it's a closed loop. There is a base map and an overlay map, which gets edited and combined on the fly. As the ecu is locked it's not possible to either merge the maps or change the Air-to-fuel (AFR) ratio. The good news is they are wide band lambda sensors so if you junk the ecu you can have some fun
