Suzuki Swift User Manual page 258

6-1-102 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
STEP
7 Was no fuel pressure applied in step 1?
8 With fuel pump operated and fuel return hose blocked
by pinching it, is fuel pressure applied?
9 1) Operate fuel pump.
2) With fuel return hose blocked by pinching it, check
fuel pressure.
Is it 450 kPa (4.5 kg/cm
10 1) Disconnect fuel return hose from pressure
regulator and connect new return hose to it.
2) Insert the other end of new return hose into
approved gasoline container.
3) Check again if specified pressure is obtained.
While doing so, does fuel come out of return hose?
Fig. for STEP 1
ACTION
2
, 63.9 psi) or more?
1. Fuel delivery pipe
2. Fuel feed hose
3. Fuel return hose
Special Tool
(A) Gauge
(B) Hose
(C) 3-way joint
YES
Go to Step 8.
Faulty fuel pressure
regulator.
Faulty fuel pressure
regulator.
Faulty fuel pressure
regulator.
ON
Go to Step 9.
Shortage of fuel or fuel
pump or its circuit
malfunction.
Clogged fuel filter,
restricted fuel feed
hose or pipe, Faulty
fuel pump or fuel
leakage from hose
connection in fuel
tank.
Fuel leakage from
injector, Fuel leakage
from between injector
and delivery pipe,
Faulty fuel pump
(faulty check valve in
fuel pump) or Fuel
leakage from fuel
pressure regulator
diaphragm.