Fuel Delivery System; Fuel Pressure Inspection - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

ENGINE AND EMISSION CONTROL SYSTEM (G16/J20 ENGINES) 6E1-31
INSTALLATION
1) Install new O-ring to throttle body.
2) Install IAC valve to throttle body.
Tighten IAC valve screws to specified torque.
Tightening torque
IAC valve screw
(a) : 3.5 N·m (0.35 kg-m, 2.5 lb-ft)
3) Connect IAC valve connector securely.
4) Connect negative cable to battery.

Fuel Delivery System

Fuel pressure inspection

1) Relieve fuel pressure in fuel feed line referring to "Fuel Pres-
sure Relief Procedure" in Section 6.
2) Using backup wrench, loosen plug bolt on fuel delivery pipe
and remove it. Connect special tools (fuel pressure gauge) to
delivery 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
approved container.
Special tool
(A) : 09912-58441
(B) : 09912-58431
(C) : 09919-46010
3) Check that battery voltage is above 11 V.
4) Turn ignition switch ON to operate fuel pump and after 3 sec-
onds turn it OFF. Repeat this 3 or 4 times and then check
fuel pressure.
5) Start engine.
6) Measure fuel pressure at idling.
If measured pressure doesn't satisfy specification, refer to
"Diagnostic Flow Table B-3" in Section 6 and check each
possibly defective part. Replace if found defective.