The present invention provides a method for balancing unicast or multicast flows in a multistage non-blocking fabric, wherein the fabric comprises at least one internal switching element stage, an input SE stage and an output SE stage. The entries may be distributed by any suitable process including, without limitation an auction or lottery process. In addition, the engine control method also provides the following features in combination with the above-described split airlean mode: idle speed control, sensor diagnostics, airfuel ratio control, adaptive learning, fuel vapor purging, catalyst temperature estimation, default operation, and exhaust gas and emission control device temperature control.