L-Series Wagon 4WD F4-1781cc 1.8L SOHC (SPFI) (1986)
Fuel Pressure Pulsation Damper: Description and Operation
Fuel Dampener
PURPOSE
Reduces noise from fuel pressure pulsation.
LOCATION
There are three.
^ On the fuel delivery line, near the throttle chamber.
^ On the fuel return line, near the throttle chamber.
^ On the fuel delivery line, near the fuel pump.
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.