A method for adjusting fuel flow to individual combustion chambers in a gas turbine having fuel nozzles for each combustion chamber, manifolds for supplying fuel to at least one fuel nozzle in each combustion chamber, wherein the manifolds have flow metering devices for the fuel nozzles and a controller for adjusting the flow metering devices, the method including: supplying fuel to the combustion chambers through at least one of the manifolds; combusting the fuel in the combustion chambers and generating exhaust gases which drive the gas turbine; determining whether one of the combustion chambers is operating relatively lean or rich by actuating a corresponding to the one of the combustion chambers to adjust fuel flowing to the one of the combustion chambers; sensing a condition of the exhaust gases at various exhaust regions in the exhaust gases and determining a change in the condition of the exhaust gas due to the actuation of the flow metering device, and correlating the change in the sensed condition of the exhaust gases to the at least one combustion chamber.