What is the reason for the excessive fuel injection pulse width?

Reasons for excessive fuel injection pulse width: 1, aging detection of oxygen sensor and water temperature sensor: excessive fuel injection pulse width generally depends on idle speed, high idle speed and pulse width are generally caused by inaccurate signals of throttle position sensor and water temperature sensor, and normal fuel injection pulse width at idle speed is generally caused by oxygen sensor failure. 2. Inaccurate closed-loop data leads to: buy a Bluetooth ODB detector and install a software to check the situation of all parts in the car or ask the people at the testing station to re-test the data. The following is the introduction of related contents: 1, the fuel injection pulse width is about 3 milliseconds at normal idle speed, and it gradually widens when refueling. 2. Too high fuel consumption is often caused by insufficient engine power. Weak acceleration and wheezing are related to ignition performance, cylinder sealing performance (cylinder pressure) and abnormal oil pressure in oil circuit.