Borrego 4WD V6-3.8L (2009)
Fuel Injector: Description and Operation
Description
Based on information from various sensors, the ECM determines the fuel injection amount. The fuel injector is a solenoid-operated valve and the fuel
injection amount is controlled by length of time that the fuel injector is held open.
The ECM controls each injector by grounding the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit
voltage should be low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector is
closed and circuit voltage should be peak for a moment.
CAUTION:
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If an injector connector is disconnected for more than 46 seconds while the engine runs, the ECM will determine that the cylinder is misfiring and
cut fuel supply. So be careful not to exceed 46 seconds.
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But the engine runs normally in 10 seconds after turning the ignition key off.
