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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Control System & Fuel System - 1.8L (Lay) - Troubleshooting & Diagnosis) >> Fuel System Diagnosis >> Circuit/System Verification

Circuit/System Verification

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    IMPORTANT:
    • Inspect the fuel system for damage or external leaks before proceeding.
    • Verify that adequate fuel is in the fuel tank before proceeding.
    • The fuel pump relay may need to be commanded ON a few times in order to obtain the highest possible fuel pressure.
  1. Ignition ON, command the fuel pump relay ON with a scan tool. You should hear the fuel pump turn ON and OFF.
  2. Ignition OFF, install the J 34730-1A  and J 42982  . See Special Tools . Refer to Fuel Pressure Gage Installation and Removal .
  3. Ignition ON, command the fuel pump relay ON with a scan tool. Verify the fuel pressure is between 301-347 kPa (44-50 psi) and does not decrease to less than 147 kPa (21 psi) for 5 minutes.
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