Fuel Pump Pressure Test
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 Isuzu VehiCROSS, 2000 Isuzu Trooper, 2000 Isuzu Rodeo, 2000 Isuzu Hombre, and 2000 Isuzu Amigo. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Ensure A/C is off (if equipped). Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Attach Fuel Pressure Gauge Set (J-34730-1) to fuel rail or fuel supply line. See Figure. Turn ignition on. Allow fuel pump to run for about 2 seconds. Check fuel pressure. See FUEL PUMP PERFORMANCE table under FUEL SYSTEM DIAGNOSIS.
- With engine at normal operating temperature, turn ignition on and let fuel pressure build to maximum pressure. Start engine and observe pressure. See FUEL PUMP PERFORMANCE table. If pressure drop is as specified, system is operating properly. If pressure does not drop as specified, see appropriate FUEL SYSTEM DIAGNOSIS procedure. Locate and repair leak or restriction in fuel system.