Van Wagon 2WD L4-2237cc 2.2L (4Y-E) (1989)
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Cold Start Injector: Description and Operation
Cold Start Injector And Circuit Schematic
The Cold Start Injector, located on the intake manifold plenum, is a solenoid operated injector, similar to the main port injectors. However, the cold start
injector is designed to stay open for seconds of operation rather than milliseconds. Operation is controlled by the Cold Start Time Switch and the
ignition switch and takes place only at cold start, in order to aid in faster starting of a cold engine.
When cranking a cold engine, (below 60° F), the ignition switch applies power to terminal STA of the Cold Start Injector and terminal STA of the Time
Switch, which grounds the Cold Start Injector and allows fuel to be delivered into the intake plenum. Fuel delivery stops when the ignition switch is
released from its cranking mode and the port injectors take over all fuel delivery.
