In this project, we fabricated an IoT chip to monitor the accuracy of fuel on both heavy and light vehicles. The system consists of parts like a liquid flow sensor, bug convertor, and node MCU 8266 This system can be used in industries to find the loss of fuel in heavy and light vehicles and it can also locate the exact location of that vehicles. We use node MCU IOT chip to monitor the fuel accuracy of the vehicles where we coded a program by using C language in Arduino and dump the code in the chip and that chip is connected. We use node MCU as a modern tool used in a different way, we create a web page that uses cloud computing technology to monitor the system. We learned about the fuel tank and fuel flow system by using this system we can reduce fuel theft in heavy vehicles as well as we can locate the exact location of the vehicles. We have designed a new tank cap to fix the system by which we can get an accurate fuel level. We have analysis about the fuel tank system from the mechanical workshop and node MCU through the internet. We use a bug convertor and node MCU as a modern tool. It is useful for all common people to protect their vehicles from theft. This project can be helpful for all lite and heavy vehicle owners.