Diagnostic Aids

Check for leakage around all fuel hose/pipe connections. A plugged fuel injector could be the cause of a hard/no-start condition or loss of power/poor fuel economy. See appropriate TESTS W/O CODES article for mechanical checks and inspections if fuel spray and pressure is normal.

Fig 1: Chart A1-7B Schematic - Except LSi Fuel System Diagnosis - Fuel Pressure Check

Fig 2: Chart A1-7B Flow Chart - Except LSi Fuel System Diagnosis - Fuel Pressure Check - 1 of 2

Fig 3: Chart A1-7B Flow Chart - Except LSi Fuel System Diagnosis - Fuel Pressure Check - 2 of 2