How do your EGR, injection timing and pilot pulse settings affect our NOx emissions while tuning a diesel engine? If you live in a part of the world that has legal restrictions on your emissions outputs, it is vital that you understand what implications the tuning changes you’re making have on the amount of nitrogen oxides emitted post tune. This free lesson which has been taken from the Diesel Tuning Fundamentals course will demonstrate how changes to your Exhaust Gas Recirculation (EGR) valve