Fuel Injectors

Turn ignition off. Unplug each injector connector. Measure resistance across both terminals. If resistance is not about 13.8 ohms measured at 68°F (20°C), replace fuel injector.
To check injector spray pattern and volume, relieve fuel system pressure. Remove injectors from engine. Disconnect fuel hose from fuel filter outlet. Use Fuel Pressure Gauge (09268-41045) to "T" fuel injector between fuel filter and fuel pressure regulator. See Fig 1 and Fig 2.
Place injector into clean container. Place tube on end of injector to prevent fuel from spilling. Connect Fuel Injector Tester (09842-30070) or trigger box with appropriate resistor to fuel injector. Turn ignition on, with engine off.
Connect jumper wire to engine check connector terminals FP and +B to pressurize fuel system. For engine check connector locations, see Figure. Connector terminals are marked on inside of check connector cover.
Trigger injector for 15 seconds. Measure volume and check spray pattern. Test each injector 2-3 times. Replace injector if volume is not 2.1-2.7 cu. in. (34-45 cc).
Disconnect injector trigger. Fuel leakage from end of injector should be one drop or less in one minute. Replace injector if leakage is more than specified.

Fig 1: Fuel Injector Spray Pattern Test

Fig 2: Fuel Injector Volume Test