Suzuki GA413 Service Manual page 453

STEP
5 1) Turn ignition switch ON position, leaving engine
OFF.
2) Check fuel pressure while blocking (pinching)
fuel return hose.
Is fuel pressure indicated within 441 – 637 kPa
(4.5 – 6.5 kg/cm
6 Was fuel pressure above specified value in Step
2?
7 1) Disconnect fuel return hose from fuel pressure
regulator.
2) Connect new fuel hose to fuel pressure regula-
tor.
3) Turn ignition switch ON position, leaving engine
OFF.
Is fuel pressure indicated within 270 – 310 kPa
(2.7 – 3.1 kg/cm
8 1) Turn ignition switch ON position, leaving engine
OFF.
2) Check fuel pressure while blocking (pinching)
fuel return hose.
Is fuel pressure applied then?
Fig. for Step 5, 8
ACTION
2
, 62.7 – 90.6 psi)?
2
, 38.4 – 44.0 psi)?
ENGINE AND EMISSION CONTROL SYSTEM 6E-43
YES
Normal fuel pressure.
Go to Step 7.
Restricted fuel return
hose or pipe.
Faulty fuel pressure reg-
ulator.
Fig. for Step 7
NO
Faulty fuel pump.
Go to Step 8.
Faulty fuel pressure reg-
ulator.
Clogged fuel filter.
Shortage of fuel.
Restricted fuel feed hose
or pipe.
Faulty fuel pump.
Fuel leakage from hose
connection in fuel tank.
Faulty fuel pump electri-
cal circuit.