Suzuki SY413 Service Manual page 2706

TABLE B-3 FUEL PRESSURE CHECK
INSPECTION
STEP
1 Check Fuel Pressure (Refer to section 6E1 for details).
1) Release fuel pressure from fuel feed line.
2) Install fuel pressure gauge.
3) Check fuel pressure by repeating ignition switch ON
and OFF. See Fig. 1.
Is fuel pressure then 270 – 310 kPa (2.7 – 3.1 kg/cm
38.4 – 44.0 psi)?
2 Is 200 kPa (2.0 kg/cm
retained for 1 minute after fuel pump is stopped at Step 1?
3 Check Fuel Pressure Regulator for Operation.
1) Start engine and warm it up to normal operating
temperature.
2) Keep it running at specified idle speed.
Is fuel pressure then within 200 – 240 kPa
(2.0 – 2.4 kg/cm
4 Is there fuel leakage from fuel feed line hose, pipe or their
joint?
5 Was fuel pressure higher than spec. in Step 1?
6 1) Disconnect fuel return hose from fuel pressure
regulator and connect new return hose to it.
2) Put the other end of new return hose into approved
gasoline container.
3) Operate fuel pump.
Is specified fuel pressure obtained then?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (G13/G16 ENGINE WITH WU TWC) 6-1-107
ACTION
2
, 28.4 psi) or higher fuel pressure
2
, 28.4 – 34.1 psi)?
YES
Go to Step 2.
2
,
Go to Step 3.
Normal fuel
pressure.
Fuel leakage from
hose, pipe or joint.
Go to Step 6.
Restricted fuel
return hose or pipe.
1. Injector
2. Delivery pipe
3. Fuel pump
4. Fuel filter
5. Fuel pump
(A): Fuel pressure gauge
(B): Hose
(C): Attachment
NO
Go to Step 5.
Go to Step 4.
Clogged vacuum
passage for fuel
pressure regulator
or faulty fuel
pressure regulator.
Go to Step 10.
Go to Step 7.
Faulty fuel
pressure regulator.