There is a well behave relationship, with the engine running, between EGT (Exhaust Gas Temperature) at the very back of the engine and TIT (Turbine Inlet Temperature) at the highest temp location at the front of the turbine. This relationship can not be depended when starting an engine if the combustion is not steadied in the burner with increasing burner pressure. Abnormaly high EGT during start signals that all is not right and its time to start over.