What Causes Excessive Fuel Metering Unit Flow?

1 Answers
BryceAnn
07/30/25 5:05am
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 volume from the metering unit exceeds the calibrated amount, the fuel entering the cylinders per cycle will increase, resulting in higher fuel consumption and significantly reduced vehicle power. In severe cases, the engine may fail to ignite. Below is additional information: 1. Symptoms of a faulty metering unit: The engine warning light on the dashboard illuminates, and the vehicle fails to start. When the fuel metering unit is damaged, the vehicle will automatically shut off the fuel injectors to prevent excessive internal pressure and potential damage. The fuel metering unit is typically installed near the high-pressure fuel pump and primarily controls fuel injection volume and fuel pressure. 2. What is fuel: Fuel is used for internal combustion engines and mainly comes in two types: gasoline and diesel.
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