Remove the cold start injector from the intake manifold, place the nozzle in a safe container and crank the engine. If the temperature of the engine is below 95 degrees, the cold-start injector should spray. If it does not, connect a test light to each of the two terminals of the injector and crank the engine. If one terminal activates the light but the other does not, replace the cold-start injector. If both terminals activate the light, inspect the wiring between the cold-start injector and the thermo-time switch. If the wiring is OK, replace the switch. If neither terminal lights up the light, repair the wiring harness between the starter solenoid and the cold-start injector.