Genuine Mercury Zephyr EGR Valve

The Mercury Zephyr EGR Valve significantly reduces combustion temperatures and harmful NOx emissions by introducing a controlled amount of exhaust gas into the intake manifold. The inert exhaust gas absorbs the temperature spikes that would otherwise cause smog-producing chemistry and engine knock. The EGR Valve is located between the exhaust and intake passages and only opens when the vehicle is at a steady cruise or gentle throttle. This means that you still get a smooth idle and full power on hard acceleration in the Zephyr. Early Mercury models applied a vacuum diaphragm type EGR Valve employing ported manifold vacuum and thermal switches to control flow. Later Zephyr editions shifted to electronically controlled EGR Valve devices with on-board motors, position sensors, and pulse width modulation to ensure faster and more accurate movement. Other configurations additionally incorporated attributes of positive or negative backpressure, allowing the exhaust pressure to calibrate the EGR Valve lift. The variance between these generations basically lies in response control. The electronic systems in Mercury Zephyr drivers help in cleaner emissions, fewer detonation issues, and lower chances of rough running. Such features help Mercury vehicles to meet tightening standards.

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