Edmunds Answers

Answers

  • MrShift@Edmunds 03/31/09 8:18 pm PST

    Surest way is for a shop to do it with a smoke machine.

    Here's a good intro to vacuum leaks and their detection

    VACUUM LEAKS

  • docj 03/31/09 11:14 pm PST

    To add..


    Check the Fuel Pressure..Low Fuel Pressure can cause a lean condition and set both codes.
    Check for a restricted fuel filter also.

    Also
    Have it smoke tested on a cold engine.The 5.3 L engines can have intake gasket problems cold.



    Doc J

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