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Testing Individual Components NOTE: For the following tests, use the Fluke Model 73 Multimeter (p/n 0644-191) or a multimeter FUEL INJECTORS Fig. 4-122 AO139D Testing Resistance/Voltage 1. Disconnect the fuel injector wiring harness. 2. Set the meter selector to the OHMS scale. 3. Test between the two injector terminals. Test specification is 2.4 - 3.3 ohms. Fig. 4-123 AO144D 4. If not within specifications, replace the injector. Removing The fuel supply hose may be under pressure. 1. Loosen the clamp securing the fuel supply hose to the fuel rail; then remove the hose from the fuel rail. 2. Disconnect the wiring harness from each injector. 3. Remove the two screws securing the injector hold-down plate to the throttle body assembly; then Fig. 4-124 AO145D 4. Remove the fuel injectors from the throttle body assembly. Fig. 4-125 AO146D Installing 1. Apply a light coat of oil to all O-rings; then install the upper and lower O-rings onto each injector. 2. Install the injectors into the throttle body assembly. ! CAUTION 4 4-43 |