What are the causes of excessive fuel injection pulse width?

[JohnnyMarie]

There are two main reasons for excessive fuel injection pulse width. Caused by car idling: Excessive fuel injection pulse width is generally related to idling. If the idling speed is high and the pulse width is large, it is usually caused by inaccurate signals from the throttle position sensor or coolant temperature sensor. If the idling speed is normal, then it is due to a faulty oxygen sensor. Caused by data: Inaccurate closed-loop data received by the ECU can also lead to this issue. The primary data involved includes signals from the oxygen sensor and coolant temperature sensor, though the intake pressure sensor and throttle position sensor should not be ruled out. You can purchase a Bluetooth OBD scanner and install software to check various parameters of the vehicle, or have a professional at a testing station re-examine the data.