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exhaust noise when cold

Discussion in 'Technical Chat' started by randyuggie, Jul 2, 2010.

  1. Jul 2, 2010 at 8:03 AM

    randyuggie [OP] New Member

    Nov 30, 2009
    First Name:
    Charlotte NC
    07 4D 4WD
    When I first start my 2007 4wheel drive (6cyl) truck I get what sounds like an exhaust sound. As the engine warms it goes away and it is worse during cold weather. They replace the manifolds and gasgets under warranty, but that did not fix problem. The dealer claims it is noise from
    purge valve at charcoal cannister. anyone have this problem. Even though I have extended warranty they will not fix because no problem shows up on system. BE GLAD WHEN HUNTING SEASON GETS HERE!!!

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