Fuel Pressure Basic Check

WARNING: When performing the following procedure, be sure to observe Precautions on Fuel System Service and PRECAUTIONS FOR ENGINE to reduce the risk of fire and personal injury.

Relieve fuel pressure in fuel feed line. See Fuel Pressure Relief Procedure
Disconnect fuel feed hose from fuel delivery pipe.
Connect special tools and hose between fuel feed hose (1) and fuel delivery pipe as shown in figure, and clamp hoses securely in order to ensure that no leaks occur during checking.
Special Tool
1. 09912-58442
2. 09912-58432
3. 09912-58490
  
  Fig 1: Checking Fuel Pressure Basic
  Courtesy of SUZUKI OF AMERICA CORP.
Check that battery voltage is 11 V or more.
Measure fuel pressure as follows.
If measured pressure is out of specification, repair or replace defective part.
1. Turn ignition switch to ON position to operate fuel pump.
2. After 2 sec., turn it OFF.
3. Repeat Step a) and b) three or four times, and then check fuel pressure.
  Fuel pressure specification
  
  Standard: 360 - 400 kPa (3.7 - 4.1 kgf/cm ² , 52.2 - 58.0 psi) (With fuel pump operating and engine stopped)
4. Warm up engine to normal operating temperature, and measure fuel pressure at idling.
  Fuel pressure specification
  
  At specified idle speed: 360 - 400 kPa (3.7 - 4.1 kgf/cm ² , 52.2 - 58.0 psi)
5. 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 kgf/cm ² , 36.3 psi)
Relieve fuel pressure. See Fuel Pressure Relief Procedure
Remove special tools from fuel delivery pipe and fuel feed hose.
Connect fuel feed hose to fuel delivery pipe and clamp it securely.
With engine stationary and ignition switch in ON position, check for fuel leaks. See Fuel Leakage Check Procedure