The design and development of modern internal combustion engines are marked by the reduction in exhaust gas emissions and an increase in specific power and torque. The reduction of noise and vibration is one of the significant attractiveness towards making diesel engines for a long time now. Countries around the world continue to legislate against the release of specific levels of exhaust gas emissions such as nitrogen oxide, hydrocarbon, carbon monoxide, and smoke. The customer requirements for combustion noise need to be met, which can be completed by optimizing the combustion system. This can be met through the development of advanced combustion systems and the increased flexibility of fuel injection systems and ECUs. This research work presents the effects of Fuel Injection Pressure on the combustion pressure and optimizing the engine noise by using Taguchi method.