Nissan 240SX Fuel Rail is a solid metal tube that delivers the pressurized gasoline from the electric fuel pump to the engine's port fuel injectors. The Fuel Rail provides a uniform and stable supply of fuel to the injectors so that the injectors can spray an atomized fuel ahead of each intake valve for efficient combustion and regulated emission levels. The Fuel Rail in the Nissan 240SX engine bay is mounted along the intake manifold runners. A pressure regulator on the line assures that fuel is maintained at a constant level such that the powertrain control module can lengthen or shorten injector pulse width in response to oxygen, mass airflow, and throttle position sensor input. The engine will get less fuel at idle and a quick adjustment allows more as load rises. The Fuel Rail is a major contributor to fuel efficiency, smooth operation, and emissions compliance. A replacement Fuel Rail for Nissan 240SX typically costs a reasonable amount. Prices differ based on the brand, construction materials, fit on vehicle. When the 240SX operates in its designed pressure range, all Nissan 240SXs benefit.
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