Fuel Line/Fuel Pressure Hold Inspection
WARNING:
Before performing the following operation, release fuel pressure from fuel system to reduce the possibility of injury or fire. See FUEL PRESSURE RELEASE
under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article.
- Check Fuel Pressure - Install Fuel Pressure Gauge (49-UN01-010). Turn ignition on, engine off. Connect scan tool to DLC. Select DIAGNOSTIC DATA LINK, PCM, ACTIVE COMMAND MODE, fuel pump PID and OUTPUT TEST MODE. Press MODE to change to ALL ON MODE. Press START to run fuel pump and observe fuel pressure. If fuel pressure is 55-70 psi (380-482 kPa),
- Check Fuel Pressure After One Minute - Observe fuel pressure after one minute. Press STOP. If fuel pressure is within 5 psi (34 kPa) of previous reading, fuel pressure hold inspection is okay. If fuel pressure is not within 5 psi (34 kPa) of previous reading, check for fuel injector leakage.