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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 774 (Engine Controls And Fuel - 2.0L - Troubleshooting & Diagnosis) >> Fuel Tank Leak Test >> System Testing

System Testing

WARNING: This page is about a different car, the 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: If the floating indicator registers any flow after stabilizing, a leak is evident.
  1. Ignition OFF, install the J 41413-200  and the GE-41415-50  . See Special Tools . Test for a fuel leak while the system is under pressure referring to the J 41413-210 Operation Manual.
  2. Using the J 41413-200  and the J 41413-210 Operation Manual, introduce smoke into the evaporative emission (EVAP) system. See Special Tools . Inspect for leaks in any of the following locations:
    • The fuel tank, the fill limiter vent valve, the pressure relief valve, and the grade vent valve
    • The fuel pump module housing, the fuel pump module seal, the fuel pipe, and the EVAP pipes
    • The fuel tank pressure (FTP) sensor seal
    • The fuel fill pipe and hose
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