See Figures 1 and 2
During cold engine starting, the cold start injector is used to supply additional fuel to the intake manifold in order to aid in initial start-up. The opening and closing of the injector is determined by the start injector time switch, located in the thermostat housing. When the engine coolant temperature falls below a certain point, the switch is tripped which opens the cold start injector. As the engine coolant warms up, the switch will eventually close the injector.
REMOVAL & INSTALLATION
- Disconnect the negative battery cable. Relieve the fuel pressure.
- Remove the cold start injector union bolt on the delivery pipe.
Before removing the union bolt, place a suitable container under it to catch any escaping fuel
- Disengage the wiring connector at the injector.
- Unscrew the two mounting bolts and then remove the cold start injector from the air intake chamber.
- Installation is in the reverse order of removal.
Always use new gaskets when reinstalling the injector
- Start the engine and check for any leaks.
See Figure 3
- Unplug the wiring connector and remove the cold start injector from the air intake chamber.
Do not disconnect the fuel line
- Remove the rubber cap from the fuel pump check terminal and short both terminals with a jumper wire.
- Using Special Tool 09843-30011, connect one end to the injector and the other to the battery.
- Hold the injector over a suitable container and then turn the ignition switch to the ON position. Do not start the engine.
- Check that the fuel splash pattern is even and V-shaped.
- Disconnect the test probes from the battery and check that the fuel does not leak from the injector tip any more than one drop per minute.
- Remove the Special Tool and install the cold start injector.
- Check the resistance of the injector. It should be 3-5 ohms.
- If the cold start injector did not operate properly in any of these tests, it will require replacement.