Fuel Delivery System; Fuel Pressure Inspection - Suzuki 2000 Grand Vitara SQ625 Service Manual

2. Fuel return pipe
3. Fuel pressure regulator
4. Engine
CONDITION
With fuel pump
operating and
engine stopped
At specified
idle speed
With 1 min. after
engine (fuel pump)
stopped (Pressure re-
duces as time passes)
FUEL PRESSURE
270 – 310 KPa
2
2.7 – 3.1 kg / cm
38.4 – 44.0 psi
210 – 260 KPa
2
2.1 – 2.6 kg / cm
29.8 – 37.0 psi
over 200 kPa
2
2.0 kg / cm
28.4 psi
ENGINE AND EMISSION CONTROL SYSTEM (H25 ENGINE) 6E2-23

FUEL DELIVERY SYSTEM

FUEL PRESSURE INSPECTION

1) Relieve fuel pressure in fuel feed line referring to "Fuel Pres-
sure Relief Procedure" in "ENGINE GENERAL INFORMA-
TION" section.
2) Disconnect fuel feed hose (3) from delivery fuel feed pipe (1).
CAUTION:
A small amount of fuel may be released when fuel feed
hose is removed. Place container under the fuel feed
hose or fuel feed pipe with a shop cloth so that released
fuel is caught in container or absorbed in cloth. Place
that cloth in an approved container.
3) Connect special tools and hose (2) between fuel feed hose and
fuel feed pipe as shown in figure, and clamp hose securely to
ensure no leaks occur during checking.
Special Tool
(A): 09912-58441
(B): 09912-58431
(C): 09912-58490
4) Check that battery voltage is above 11 V.
5) Turn ignition switch ON to operate fuel pump and after 3 se-
conds turn it OFF. Repeat this 3 or 4 times and then check fuel
pressure.
6) Start engine.
7) Measure fuel pressure at idling.
If measure pressure doesn't satisfy specification, refer to
"Diagnostic Flow Table B-3" and check each possibly defective
part. Replace if found defective.
8) After checking fuel pressure, remove fuel pressure gauge.
CAUTION:
As fuel feed line is still under high fuel pressure, make
sure to release fuel pressure according to following
procedures.
D Place fuel container under joint.
D Cover joint with rag and loosen joint nut slowly to
release fuel pressure gradually.
9) Remove fuel pressure gauge, hose and 3-way joint.
10) Connect fuel feed hose and clamp it securely.
11) With engine "OFF" and ignition switch "ON", check for fuel
leaks.