Fuel Injector Inspection

Reference: FUEL INJECTOR REMOVAL AND INSTALLATION 

1. Install injector (1) and pressure regulator (2) to special tool (A), and connect pressure regulator to fuel return pipe (4) using hose included in special tool (A).

   Special Tool 

   1. 09912-58421 
2. Connect special tools (B) to fuel feed pipe (3) and injector (1).

   Special Tool 

   (B): 09912-58442 

3. Connect special tool (C) to injector (1).

   Special Tool 

   (C): 09930-88530 

   Fig 1: Identifying Injector, Pressure Regulator, Special Tool & Fuel Return Pipe

   Courtesy of SUZUKI OF AMERICA CORP.
4. Install suitable vinyl tube onto injector nozzle to prevent fuel from splashing out when injecting.
5. Put graduated cylinder under injector.
6. Operate fuel pump and apply fuel pressure to injector as follows:
   1. When using scan tool:
      1. Connect scan tool to DLC with ignition switch OFF.
      2. Turn ignition switch ON, clear DTC and select "MISC TEST" mode on scan tool.
      3. Turn fuel pump ON by using scan tool.

         Special Tool 

         1. SUZUKI scan tool 
         Fig 2: Connecting Scan Tool To DLC

         Courtesy of SUZUKI OF AMERICA CORP.
   2. When not using scan tool:
      1. Remove fuel pump relay from connector.
      2. Connect two terminals of relay connector using service wire (1) as shown in figure.
         CAUTION: Check to make sure that connection is made between correct terminals. Wrong connection can cause damage to ECM, wire harness, etc.
         Fig 3: Connecting Two Terminals Of Relay Connector Using Service Wire

         Courtesy of SUZUKI OF AMERICA CORP.
      3. Turn ignition switch ON.
7. Apply battery voltage to injector (1) for 15 seconds and measure injected fuel volume with graduated cylinder. Test each injector two or three times.

   Reference injected fuel volume 

   Approx. 65 cc/15 sec. (2.20/2.29 US/Imp oz/15 sec.) 

8. Check fuel leakage from injector nozzle. Do not operate injector for this check (but fuel pump should be at work). If fuel leaks (1) more than the following specifications, replace.

   Fuel leakage 

   Less than 1 drop/min  .

   Fig 4: Checking Fuel Leakage From Injector Nozzle

   Courtesy of SUZUKI OF AMERICA CORP.