the defined operational parameters in fig7 the tuning criteria is again nox emissions with the alarm created by a low reading received by tuning controller as shown the nox tuning limit nl is defined upon passage of the set time period from receiving data the alarm is generated and a first event e 1 occurs at the first event e 1 the fuel split is incremental adjust downward after a set passage of time from event e 1 additional emissions data ne is received and compared to the preset limit el because the nox is still below the alarm level el a second event e 2 occurs resulting in a further reduction in the fuel split value fs a further passage of time from event e 2 occurs and additional data is received again the nox data is low maintaining the alarm and resulting in a further event e 3 at event e 3 the fuel split value fs is again reduced by the same incremental amount this third incremental adjustment results in the nox emissions ne rising above the preset limit el and results in removal of the alarm the fuel split fs tuning value set after event e 3 is held in place by the tuning controller in fig8 the nox emissions data ne received by the tuning controller is again tracking along the lower emissions limit el at the first tuning event e 1 the fuel split value fs is incrementally.