Sidekick JS 2D Soft Top 2WD L4-1.6L (1997)
Fuel Pressure Regulator: Description and Operation
The fuel pressure regulator is diaphragm-operated relief valve consisting of diaphragm, spring and valve. It keeps the fuel pressure applied to the
injector 290 kPa (2.9 kg/cm2, 41.2 psi) higher than that in the intake manifold at all times. The pressure applied to the chamber "A" of fuel
pressure regulator is intake manifold pressure and that to the chamber "B" is fuel pressure.
When the fuel pressure rises more than 290 kPa (2.9 kg/cm2, 41.2 psi) higher than the intake manifold pressure, the fuel pushes the valve in the
regulator open and excess fuel returns to the fuel tank via the return line.
