What Causes Excessive Fuel Metering Unit Flow?

1 Answers
Tobias
07/29/25 8:41pm
Excessive fuel metering unit flow indicates a malfunction in the fuel metering unit, leading to increased fuel consumption or reduced power. If the fuel injection quantity of the metering unit is higher than the calibrated value, the amount of fuel entering the cylinder each time will increase, resulting in higher fuel consumption and a significant drop in vehicle power. In severe cases, it may even prevent ignition. Additional Information: Symptoms of a faulty metering unit: The engine warning light on the vehicle dashboard illuminates, and the vehicle fails to start. When the fuel metering unit is damaged, the vehicle will automatically shut off the fuel injector to prevent damage caused by excessive internal pressure. The fuel metering unit is typically installed near the high-pressure fuel pump and primarily functions to control fuel injection quantity and fuel pressure values.
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