The Fuel Rail of the Nissan Murano carries fuel under pressure to each injector to spray finely for clean. The Fuel Rail acts as a sealed manifold that receives flow from an electric pump and holds it steady so the powertrain control module can pulse the injectors with extreme accuracy. This adjusts fuel volume for idle, cruise, or heavy load. Initial versions of the Nissan Murano utilized a multiport system wherein the Fuel Rail seated itself on the intake runners and fed port injectors set just in front of the valves. This was more efficient in terms of atomization than the older throttle-body setup on other cars. The engines of the Murano were later upgraded to include gasoline direct injection. As a result, the engineers paired the higher-strength Fuel Rail. Moreover, they designed the quick-response injectors to spray directly into the combustion chamber. Consequently, it was possible for the computer to time multiple bursts. This installation allowed for stronger power and lower emissions. Furthermore, it improved the mileage of the vehicle as well. Each Nissan model, no matter the generation, shares the same goal: consistent pressure for an efficient burn. A replacement cost for a worn Fuel Rail can run a reasonable amount, exclusive of labor.
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