How to Solve Excessive Fuel Injection Pulse Width?
4 Answers
Solutions for excessive fuel injection pulse width are as follows: 1. Check if the oxygen sensor and coolant temperature sensor are aging: Excessive fuel injection pulse width usually needs to be considered in conjunction with idle speed. If the idle speed is high and the pulse width is large, it is generally caused by inaccurate signals from the throttle position sensor or coolant temperature sensor. If the idle speed is normal but the pulse width is large, it is usually due to a faulty oxygen sensor. 2. Inaccurate closed-loop data received by the ECU: Among these data, the oxygen sensor and coolant temperature sensor are the main factors, though the intake pressure sensor and throttle position sensor cannot be ruled out. You can use a Bluetooth OBD scanner to check the vehicle's internal conditions or have the data rechecked by professionals at a testing station.
Last time my car had excessively high fuel injection pulse width, and the fuel consumption skyrocketed, which was really a headache. I quickly checked the trouble codes, which indicated an issue with the oxygen sensor. After replacing it with a new part, the situation improved. However, this doesn’t address the root cause. Excessive fuel injection not only wastes money on gas but also leads to carbon buildup, which over time can make the engine struggle and affect its lifespan. I enjoy working on my car myself, so I regularly check the air filter and fuel system, clearing any blockages in the fuel lines. If the data stream shows abnormal fuel injection, cleaning the fuel injectors can also help, preventing minor issues from turning into major repairs. In short, early detection and timely action are key. Pay attention to sensor data during maintenance, and don’t wait until the engine light comes on to panic.
When encountering excessive fuel injection pulse width, I prioritize diagnosing the root cause. Using an OBDII scanner to monitor real-time data, I check whether the oxygen sensor or MAF sensor is providing faulty feedback, leading to ECU control errors. For vacuum leaks, I use a smoke test to locate the leak point; if the fuel injectors are clogged or worn out, I clean or replace them directly. Don't forget the fuel pressure test, as excessive pressure can also worsen fuel injection. After repairs, reset the ECU, and the pulse width typically returns to normal after system recalibration. Preventive maintenance, such as regular sensor cleaning, can significantly reduce this issue. Long-term neglect not only increases fuel consumption but may also degrade engine performance.
As an average car owner without much technical knowledge, I only know that excessively high fuel injection pulse width increases fuel consumption. Once my car showed similar symptoms with the engine warning light on. I didn't attempt DIY fixes but immediately drove to a professional repair shop for diagnosis. The mechanic used diagnostic tools and found a faulty mass airflow sensor. After repair, everything returned to normal. My advice: don't attempt complex inspections yourself - pulse width issues often stem from minor components like sensor failures or wiring harness aging. Timely repairs prevent wasting money on extra fuel while making your car run smoother.
