Diagnostic Information And Procedures; Fuel Pressure Inspection - Suzuki GRAND VITARA Owner's Manual

Fuel Pressure Inspection

WARNING
!
Before starting the following procedure, be
sure to observe "Precautions on Fuel System
Service: " in order to reduce the risk or fire
and personal injury.
1) Relieve fuel pressure in fuel feed line referring to
"Fuel Pressure Relief Procedure: ".
2) Disconnect fuel feed hose from fuel delivery pipe.
3) Connect special tools and hose between fuel feed
hose (1) and fuel delivery pipe as shown in the
figure, and clamp hoses securely in order to ensure
that no leaks occur during checking.
Special tool
(A): 09912–58413
(B): 09912–58490
[A]
[B]
(A)
[A]. For M16 engine model
[B]. For J20 engine model

Diagnostic Information and Procedures

S5JB0A1704001
(A)
(B)
(B)
I5JB0A171003-01
4) Check that battery voltage is 11 V or more.
5) Measure fuel pressure at each condition.
If measured pressure is out of specification, refer to
"Fuel Pressure Check: in Section 1A" and check
each possibly defective part. Replace if found
defective.
a) Turn ignition switch ON to operate fuel pump and
after 2 seconds turn it OFF. Repeat this 3 or 4
times and then check fuel pressure.
Fuel pressure specification with fuel pump
operating and engine stopped
: 270 – 310 kPa (2.7 – 3.1 kg/cm
psi)
b) Start engine and warm it up to normal operating
temperature, and measure fuel pressure at
idling.
Fuel pressure specification at specified idle
speed
: 270 – 310 kPa (2.7 – 3.1 kg/cm
psi)
c) Stop engine, and measure fuel pressure at one
minute after stopping.
Fuel pressure specification with 1 min. after
engine (fuel pump) stop (Pressure reduces
as time passes)
For M16 engine model: Over 250 kPa (2.5 kg/
cm 2 , 35.6 psi)
For J20 engine model: Over 200 kPa (2.0 kg/
cm 2 , 28.4 psi)
Fuel System: 1G-3
2 , 38.4 – 44.0
2 , 38.4 – 44.0