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

6E1-24 ENGINE AND EMISSION CONTROL SYSTEM (G16 / J20 ENGINES)
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 DELIVERY SYSTEM

FUEL PRESSURE INSPECTION

1) Relieve fuel pressure in fuel feed line referring to p. 6-4.
2) Using backup wrench, loosen plug bolt on fuel delivery pipe and
3) Check that battery voltage is above 11V.
4) Turn ignition switch ON to operate fuel pump and after 3 seconds
FUEL PRESSURE
250 – 300 KPa
2
2.5 – 3.0 kg / cm
35.6 – 42.7 psi
5) Start engine.
6) Measure fuel pressure at idling.
210 – 260 KPa
2
2.1 – 2.6 kg / cm
29.8 – 37.0 psi
over 180 kPa
2
1.8 kg / cm
25.6 psi
7) After checking fuel pressure, remove fuel pressure gauge.
remove it. Connect special tools (fuel pressure gauge) to deliv-
ery pipe.
CAUTION:
A small amount of fuel may be released when plug bolt
is loosened. Place container under the bolt or cover bolt
hole with a shop cloth so that released fuel is caught in
container or absorbed in cloth. Place that cloth in an ap-
proved container.
Special Tool
(A): 09912-58441
(B): 09912-58431
(C): 09919-46010
turn it OFF. Repeat this 3 or 4 times and then check fuel pres-
sure.
If measured pressure doesn't satisfy specification, refer to
"Diagnostic Flow Table B-3" in "ENGINE DIAGNOSIS" section
and check each possibly defective part. Replace if found defec-
tive.
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.