Fuel Injector: Inspection

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INJECTION VOLUME AND LEAKAGE

Check the injector injection.

CAUTION:

This test involves high-pressure fuel and electricity.
Take every precaution regarding safe handling of both the fuel and the electrical parts.
Perform this test in a safe area, and avoid any sparks or flame.
Do not smoke.

Assemble SST as shown in the illustration.
SST 09268-31011 (95336-08070,09268-41091, 09268-41110, 09268-41300, 09268-41500)

Fig 1: Assembling SST
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Discharge the fuel system pressure (see PRECAUTION ).
Disconnect the fuel inlet hose (fuel tube connector) from the No. 1 fuel pipe.
Remove the bolt and disconnect the fuel pressure regulator from the fuel delivery pipe.
NOTE: Do not disconnect the No. 2 fuel hose from the fuel pressure regulator.
Connect SST to the No. 1 fuel pipe.
CAUTION: Always read the precautions before connecting the fuel tube connector.

Fig 2: Connecting SST To No. 1 Fuel Pipe
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect SST (hose) to the fuel inlet of the pressure regulator with another SST (union), O-ring and the 2 bolts.
Torque: 7.5 N*m (77 kgf*cm, 66 in.*lbf)
Connect the fuel return hose to the fuel outlet of the pressure regulator.

Fig 3: Connecting SST (Hose) To Fuel Inlet Of Pressure Regulator With Another SST (Union), O-Ring And bolts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Install the O-ring to the injector.
Connect SSTs (adaptor and hose) to the injector, and hold the injector and union with another SST (clamp).
SST 09268-31011 (95336-08070, 09268-41110, 09268-41300)

Fig 4: Connecting SSTs (Adaptor And Hose) To Injector, And Hold Injector And Union With Another SST (Clamp)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Put the injector into a graduated cylinder.
CAUTION: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.
Connect the Techstream to the DLC3.
Operate the fuel pump (see ON-VEHICLE INSPECTION ).

Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.

SST 09842-30070

Standard volume

STANDARD VOLUME

Injection volume	Difference between each injector
56 to 69 cm³ (3.4 to 4.2 cu in.) per 15 seconds	13 cm³ (0.8 cu in.) or less

If the injection volume is not as specified, replace the injector.

Fig 5: Connecting SST (Wire) To Injector And Battery

Check for fuel leak.
1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check for fuel leak from the injector.
  SST 09842-30070
  
  Fuel leak: 1 drop or less per 12 minutes
2. Turn the ignition switch OFF.
3. Disconnect the cable from the negative (-) battery terminal.
4. Remove SST and fuel tube connector.
  SST 09842-30070
5. Disconnect the Techstream from the DLC3.
6. Reconnect the fuel inlet pipe to the fuel tube.
  
  Fig 6: Checking Fuel Leak From Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002