Checking Fuel Pressure

WARNING: High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE procedure.

Using scan tool, stop fuel system actuation. Raise and support vehicle so all wheels are off the ground. Start engine. Press and hold brake pedal. Put gear shift lever in Drive. While monitoring fuel pressure, quickly press and hold gas pedal halfway down for a few seconds. If fuel pressure dropped to less than 35 psi (2.5 kg/cm² ) at any time, go to next step. If fuel pressure did not drop to less than 35 psi (2.5 kg/cm² ) at any time, fuel pressure is normal. Test is complete.
Return vehicle to idle. Put gear shift lever in Park. Turn ignition off. Inspect fuel lines for kinked or restricted lines. Repair fuel lines as necessary. Perform TEST VER-2.
If no kinked or restricted lines exist, release fuel pressure. Remove fuel pressure gauge. Reconnect fuel supply line to fuel rail. If vehicle is a FJ22 body, go to step 5). If vehicle is a JA body, install fuel pressure gauge between fuel tank and fuel filter. Turn ignition on. Using scan tool, actuate fuel system. If fuel pressure is at least 5 psi (0.4 kg/cm² ) more than previously recorded pressure, replace fuel filter. Perform TEST VER-2.
If fuel pressure is not at least 5 psi (0.4 kg/cm² ) more than previous reading, stop fuel system actuation. Replace fuel pump and pressure regulator assembly. Perform TEST VER-2.
Remove fuel filter. Adjust shop air to 40 psi (2.8 kg/cm² ). Using shop air, attempt to blow air through fuel filter. If fuel filter is restricted, replace fuel filter. Perform TEST VER-2 . If fuel filter is not restricted, replace fuel pump. Perform TEST VER-2.