What is the consequence of an uncalibrated fuel metering system?

An uncalibrated fuel metering system can lead to inconsistent engine performance because it will not accurately control the amount of fuel being delivered to the engine based on its operating conditions. This can cause variations in fuel-air mixture, leading to problems such as engine misfires, rough idling, poor acceleration, and fluctuations in power output. These inconsistencies can affect the overall reliability of the engine and might hinder its ability to perform at its optimal level.

In contrast, an accurately calibrated fuel metering system ensures that the right amount of fuel is delivered at the right time, allowing for smooth operation and maintaining performance stability across various driving conditions. This highlights the importance of proper calibration in achieving both efficiency and reliability in engine performance.