If you want to know if you're running lean or rich, get a wideband O2 sensor. Egt gauge is only gonna give you a read out of your combustion temp and kinda just gives you an idea of how hot your engine is running. If its running too hot, then time to check the engine/ignition timing and fuel system out. As long as you're below 1400-1500 degrees, it should be ok for an FI car.