Impulse Hatchback L4-1809cc 1.8L DOHC (4XF1-W) (1992)
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EGR Valve: Description and Operation
EGR Valve
PURPOSE
Allows exhaust gas to enter the intake manifold.
LOCATION
On intake manifold, near throttle body.
OPERATION AND CONSTRUCTION
This valve is controlled by a flexible diaphragm which is spring loaded to hold the valve closed. Vacuum applied to the top side of the diaphragm
overcomes spring pressure and opens the valve in the exhaust port, allowing exhaust gas into the intake manifold and thus to the cylinders.
