How do you prevent smoke belching?

Regular preventive maintenance and sealing of the injection pump to address the issue of tampering. Another low-cost measure is to re-install the thermostat to ensure that the engine reaches efficient operating temperature. The thermostat, although part of the original manufacture of motor vehicles, is commonly removed due to the misconception that this device is not necessary in a tropical country. Contrary to this popular belief, however, a thermostat is especially needed for diesel engines as it helps ignite the diesel fuel more efficiently which then translates to at least 10% fuel savings simply because less energy is required.