Testing and tuning a CNG-fitted car is a crucial process to ensure that the vehicle operates efficiently, smoothly, and within the required emission standards after the installation of the CNG kit. The process begins with a comprehensive inspection of all components, including the CNG tank, pressure regulator, injectors, Electronic Control Unit (ECU), and fuel lines. The first step in testing involves checking for any gas leaks in the system, as this is a safety concern. Leak detectors are used to ensure that the entire CNG system, from the tank to the injectors, is airtight. Once the system is leak-free, the car is started, and the ECU is calibrated to sync the CNG system with the vehicle engine management system. This step ensures the vehicle can switch seamlessly between CNG and petrol or diesel modes without compromising performance or fuel efficiency.
The ECU also controls the timing and fuel mixture, so precise tuning is essential to optimize engine performance, fuel economy, and emission levels. The injectors are tested for proper fuel delivery to each cylinder to ensure that the correct amount of CNG is injected at the right moment. This step is crucial in preventing engine misfires, knocking, or poor fuel efficiency. After the injectors are tested, the vehicle is taken for a road test to check how it performs under different driving conditions. During the road test, various parameters such as engine responsiveness, acceleration, idle speed, and overall driving comfort are monitored. Additionally, the exhaust emissions are measured using an emission analyzer to ensure the vehicle is compliant with the required environmental standards, such as BS6 in India. If any discrepancies are found in performance or emissions, further tuning adjustments are made, such as modifying the air-fuel mixture or adjusting the timing of fuel injection. Once the vehicle passes all performance checks and emission tests, the final tuning is completed. The car is then ready for use with a well-calibrated CNG system that maximizes fuel efficiency, minimizes harmful emissions, and ensures smooth operation. Regular testing and periodic re-tuning are recommended to maintain optimal performance and compliance with evolving emission standards.