Useful tips

What causes high injector pulse width?

What causes high injector pulse width?

When the fuel injector flow becomes restricted or blocked the engine controller will attempt to increase the fuel flow by opening the injector for a longer period of time, increasing the injector pulse width.

What causes low injector pulse width?

The slowest unmetered fuel leak can often transmit more fuel than necessary at idle, causing a rough idle. The engine controller will attempt to adjust the fuel flow by opening the injector for a shorter period of time, reducing the injector pulse width.

What is minimum injector pulse width?

Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms.

How do you test a diesel injector pulse?

Unplug the electrical connector from the fuel injector you want to test. Turn the ignition switch to the ON position. Touch the terminals (one at a time) of the harness connector with the test light. One of the terminals should make the test light glow, this is the injector power source coming from the computer.

What is the difference between the pulse width and the duty cycle of an injector?

The Injector Duty Cycle (IDC) is basically the percentage of time an injector is energised (open) during an engines cycle i.e. 0% IDC injector is off, and 100% IDC the injector is permanently open. The Injector Pulse Width is the time an injector is energised (open).

What should injector pulse width be?

between 2.5 and 3.5 ms
Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms.

What is base pulse width?

GM: Base Pulse Width (BPW) Basically, the BPW is how long the injectors need to be open in order to fill cylinders at 100% volumetric efficiency at a standardized temperature.

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