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Thread: Vortec EGR System?

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  1. 06-02-2013 #30
    Fast355
    Fast355 is offline
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    Quote Originally Posted by gregs78cam View Post
    I can tell you that on our '99 Grand Am with 3.4L, EGR not functioning reduces MPG by 10%.
    Funny thing, my grandmothers '03 Alero 3.4 that is driven only in the city increased its MPG over 20% with a tune, running disabled EGR.
    Last edited by Fast355; 06-02-2013 at 05:51 PM.
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