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Answer :
Final answer:
When fuel leaks from the high-pressure rail of an electronic FCV, the pulse width typically increases to compensate for the reduced fuel pressure. This adjustment helps maintain engine performance despite the leak. If the leak is severe, the system may struggle and could eventually decrease the pulse width.
Explanation:
Understanding Fuel Leaks and Pulse Width in Electronic FCVs
When fuel leaks from the high-pressure rail in an electronic fuel control valve (FCV) system, the length of the pulse width is typically affected. In this context, the pulse width is the duration for which the fuel injector is open, allowing fuel to enter the engine's combustion chamber.
When a fuel leak occurs, there is a drop in fuel pressure within the system. This drop can lead to a perceived decrease in fuel delivery, which triggers the engine control unit (ECU) to adjust the injector pulse width. Consequently, the ECU may increase the pulse width to compensate for the reduced fuel supply in order to maintain performance and ensure proper engine operation. Therefore, the most likely outcome is that the pulse width increases in response to the fuel leak.
It's important to note that if the leak is significant, the system might eventually compensate poorly, leading to a decrease in the pulse width as it struggles to maintain operation with insufficient pressure.
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