If you have a vehicle with a diesel engine, diesel performance chips/tuners can help you get the most out of it. Engine chip tuning can help you and your vehicle in many different ways. One of the things that it can do is help you get more horsepower out of your vehicle. The ECU usually comes from the factory with conservative software settings, and that includes the power settings. While these settings can help your car remain stable under various different conditions, the problem is that some power is left behind. The diesel performance tuners can change the fuel/air ratio as well as timing and give your vehicle extra power and torque.