Suzuki Liana RH418, Supplementary Service Manual

Page: 101 / 371

Engine General Information and Diagnosis: 1A-88
Fuel Pressure Check
S3RH0B1104047
System Diagram
Special tool
(A): 09912–58442
(B): 09912–58432
(C): 09912–58490
Troubleshooting
I2RH0B110082-01
1. Injector 3. Fuel pressure regulator
2. Delivery pipe 4. Fuel pump
Step Action Yes No
1 Check fuel pressure
1) Release fuel pressure from fuel feed line.
2) Install fuel pressure gauge.
3) Check fuel pressure by repeating ignition switch ON and
OFF.
Is fuel pressure then 270 – 310 kPa (2.7 – 3.1 kg/cm 2 , 38.4 –
44.0 psi)?
Go to Step 2. Go to Step 5.
2 Is 250 kPa (2.5 kg/cm 2 , 35.6 psi) or higher fuel pressure
retained for 1 minute after fuel pump is stopped at Step 1?
Go to Step 3. Go to Step 4.
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 270 – 310 kPa (2.7 – 3.1 kg/cm 2 ,
38.4 – 44.0 psi)?
Normal fuel pressure. Clogged vacuum
passage for fuel
pressure regulator or
faulty fuel pressure
regulator.
4 Is there fuel leakage from fuel feed line hose, pipe or their
joint? Fuel leakage from hose,
pipe or joint. Go to Step 10.
5 Was fuel pressure higher than spec. in Step 1? Go to Step 6. Go to Step 7.
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?
Restricted fuel return
hose or pipe. Faulty fuel pressure
regulator.
7 Was no fuel pressure applied in Step 1? Go to Step 8. Go to Step 9.