Direct Fuel Injection
90-8M0050731 MAY 2011 Page 3B-51
Air Pressure Regulator
The air pressure regulator is located on the port fuel rail.
The air regulator uses a spring to control the air pressure. This spring holds the diaphragm against the diaphragm seat. The air
must reach a pressure that is equal to or greater than the spring pressure holding the diaphragm closed. When the air pressure
exceeds the pressure of the spring, the diaphragm is lifted off the diaphragm seat, allowing the excess air pressure to dump into
the discharge hose.
Tracker Valve
The tracker valve is located on the starboard fuel/air rail assembly.
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