Grand Vitara 2WD V6-2.7L (2006)
Fuel Pressure: Testing and Inspection
Fuel Pressure Inspection
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 No.2 pipe.
3. Connect special tools and hose between fuel feed hose (1) and fuel No.2 pipe as shown in figure, and clamp hoses securely in order to ensure that
no leaks occur during checking.
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 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/sq.cm, 38.4 - 44.0 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/sq.cm, 38.4 - 44.0 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)
Over 250 kPa (2.5 kg/sq.cm, 35.6 psi)
6. After checking fuel pressure, remove fuel pressure gauge.
WARNING: As fuel feed line is still under high fuel pressure, make sure to release fuel pressure according to the following procedures.
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Place fuel container under joint.
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Cover joint with rag and loosen joint nut slowly in order to release fuel pressure gradually.
7. Remove special tools from fuel No.2 pipe and fuel feed hose.
8. Connect fuel feed hose to fuel No.2 pipe and clamp it securely.
