Starting Mode

When the ignition switch is turned to the ON position, before engaging the starter, the Control Module energizes the fuel pump relay for 2 seconds allowing the fuel pump to build up pressure. The Control Module then checks the Engine Coolant Temperature (ECT) sensor and the Throttle Position (TP) sensor in order to determine the proper air and fuel ratio for starting. The Control Module controls the amount of fuel delivered in the starting mode by changing how long the injectors are energized. This is done by pulsing the injectors for very short times.