What is the normal value of fuel injection pulse width for an engine?

[MacEmilia]

Engine fuel injection pulse width normally ranges between 1.5 to 2.9 milliseconds (ms). The fuel injection pulse width refers to the duration of each fuel injection controlled by the engine's ECU, serving as a primary indicator of whether the engine's fuel injection system is functioning properly. Methods to address excessive fuel injection pulse width include: 1. Checking whether the oxygen sensor and coolant temperature sensor have aged, replacing them if necessary; 2. If the closed-loop data obtained by the ECU is inaccurate, it requires recalibration by professional technicians at a testing station. The unit of measurement for automotive fuel injection pulse width is milliseconds. A higher displayed value indicates a longer duration for each fuel injection, while a lower value signifies a shorter injection duration.

[MacColin]

What is the normal value for engine injection pulse width? I've pondered this question for quite a while. From my driving experience, the injection duration isn't a fixed number—it varies significantly under different conditions. At idle, it's typically around 1-2 milliseconds, while during acceleration or under high load, it can increase to 5-10 milliseconds. My old car normally runs at about 1.5 milliseconds, but newer models might be more precise. If the value is too high (e.g., exceeding 10 milliseconds), it can lead to increased fuel consumption or black smoke, indicating a need to check the fuel system. If it's too low (below 1 millisecond), insufficient fuel injection may cause engine instability. It's best to use an OBD diagnostic tool to read real-time data, and regular maintenance can prevent major issues. In short, the value depends on the vehicle model and operating conditions—don't generalize. Keeping the engine healthy is what really matters.

[VonElle]

I often help friends with car computer parameter tuning, and the normal value of fuel injection pulse width indeed varies by vehicle. For example, my ride idles at around 1.5 milliseconds, which can double to over 3 milliseconds on highways, with 1-10 milliseconds being a common range overall. If this value goes out of control during modifications, fuel efficiency takes a hit; prolonged low values might indicate clogged injectors, affecting power output. I recommend using simple diagnostic tools to monitor the data and ensure it stays within a reasonable range. Don't overlook this—smooth engine operation means safer drives. I've found that many minor issues can be preemptively addressed through regular data checks, saving the hassle of breakdowns mid-journey.

[McElaina]

The normal injection pulse width can range from 1 to 10 milliseconds, and I pay attention to this detail while driving. At normal idle, it's 1-2 milliseconds, and during acceleration, it's 5-10 milliseconds. If it deviates too much, such as being less than 1 millisecond, the engine may shake or stall; if it's more than 10 milliseconds, fuel consumption will skyrocket, affecting your wallet. During routine maintenance, ask the technician to scan a code—if the data is within the normal range, you can rest assured. This helps detect faults early, preventing issues on the road. A simple check brings many benefits for both the car and the driver.