Diagnostic Aids

Improper fuel system pressure can result in cranks but will not run condition, Code 44 (low pressure), Code 45 (high pressure), engine misfire (may feel like ignition problem), poor fuel economy, loss of power or hesitation.

Fig 1: Chart A-7 Schematic - Fuel System Pressure Test (3.1L Pickup)

Courtesy of ISUZU MOTOR CO.

Fig 2: Chart A-7 Diagram - Fuel System Pressure Test (3.1L Pickup)

Courtesy of ISUZU MOTOR CO.

Fig 3: Chart A-7 Schematic - Fuel System Pressure Test (3.1L Rodeo)

Courtesy of ISUZU MOTOR CO.

Fig 4: Chart A-7 Flow Chart (1 of 2) - Fuel System Pressure Test (3.1L)

Courtesy of ISUZU MOTOR CO.

Fig 5: Chart A-7 Flow Chart (2 of 2) - Fuel System Pressure Test (3.1L)

Courtesy of ISUZU MOTOR CO.