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INSTALLATION WARNING: THE FUEL SYSTEM IS UNDER A CON- BEFORE SERVICING FUEL INJECTOR(S), FUEL SYSTEM PRESSURE MUST BE RELEASED. To release fuel pressure, refer to Fuel System Pres- sure Release Procedure. To remove one or more fuel injectors, fuel rail assembly must be removed from engine. (1) Apply a small amount of clean engine oil to each fuel injector o-ring. This will help in fuel rail (2) Install injector(s) and injector clip(s) to fuel rail. (3) Install fuel rail assembly. Refer to Fuel Injector Rail Removal/Installation. (4) Install air cleaner. FUEL PUMP RELAY DESCRIPTION The 5–pin, 12–volt, fuel pump relay is located in the Power Distribution Center (PDC). Refer to the OPERATION The Powertrain Control Module (PCM) energizes the electric fuel pump through the fuel pump relay. Whenever the ignition key is turned ON, the elec- tric fuel pump will operate. But, the PCM will shut- REMOVAL The fuel pump relay is located in the Power Distri- bution Center (PDC) (Fig. 33) . Refer to label on PDC (1) Remove PDC cover. connector terminals for damage or corrosion. Repair (4) Check for pin height (pin height should be the same for all terminals within the PDC connector). INSTALLATION The fuel pump relay is located in the Power Distri- bution Center (PDC) (Fig. 33) . Refer to label on PDC (1) Install relay to PDC. IDLE AIR CONTROL MOTOR DESCRIPTION The IAC stepper motor is mounted to the throttle body, and regulates the amount of air bypassing the OPERATION At idle, engine speed can be increased by retract- ing the IAC motor pintle and allowing more air to The IAC is called a stepper motor because it is moved (rotated) in steps, or increments. Opening the The PCM uses the IAC motor to control idle speed (along with timing) and to reach a desired MAP dur- Fig. 33 Power Distribution Center (PDC) 1 - POWER DISTRIBUTION CENTER (PDC) 14 - 40 FUEL INJECTION AN FUEL INJECTOR (Continued) |