Fuel Delivery System Description - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

Fuel Delivery System Description

The fuel delivery system consists of the fuel tank (1), fuel pump (2), fuel filter (3), fuel pressure regulator (6),
delivery pipe (10) and fuel injectors (9).
The fuel in the fuel tank is pumped up by the fuel pump, filtered by the fuel filter and fed under pressure to each
injector through the delivery pipe.
As the fuel pressure applied to the injector (the fuel pressure in the fuel feed line (4)) is always kept a certain
amount higher than the pressure in the intake manifold by the fuel pressure regulator, the fuel is injected into the
intake port of the cylinder head when the injector opens according to the injection signal from ECM (PCM).
The fuel relieved by the fuel pressure regulator returns through the fuel return line (5) to the fuel tank.
FUEL DELIVERY SYSTEM DIAGRAM
"A" : Fuel
"B" : Air
7. Vacuum hose for fuel pressure regulator
ENGINE AND EMISSION CONTROL SYSTEM (H25 ENGINE) 6E2-7
8. Intake manifold surge tank
11. Throttle valve