XT 4WD F4-1781cc 1.8L SOHC (1990)
Fuel Pressure Pulsation Damper: Description and Operation
Fuel Dampener
PURPOSE
Reduces noise from fuel pressure pulsation.
LOCATION
On the fuel deliver hose, near the injector rail.
OPERATION
While the injector opens and closes rapidly, pulsations are created in the fuel lines. Inside the dampener is a chamber with a diaphragm. The
diaphragm is attatched to a spring. When the fuel pressure pulsates, the diaphragm absorbs the pulsations, reducing noise.