SSANGYONG 1999 Musso Service Manual page 619

The pressure difference between the fuel pressure and
the intake manifold is approx. 3.2 bars during idling.
1. Fuel Pressure Regulator
2. Intake Manifold
3. Fuel Return(to fuel tank)
4. Fuel Supply(from fuel pump)
7. Fuel Pressure(approx. 3.2 bars)
8. Intake Manifold Negative Pressure(0.6 bars)
<Fuel Pressure Diagram>
A. Fuel pressure
B. Intake Manifold Negative Pressure
LL. Idling
TL. Partial load
VL. Full load
M162 ENGINE CONTROLS 1F1-49