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New EGR, poor MPG

Discussion in 'Trucks [ Eighteen Wheelers ]' started by strato, Mar 6, 2015.

  1. Mar 6, 2015 #1
    strato

    strato Bobtail Member

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    Apr 1, 2013
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    Hey guys, I had a new EGR valve installed on my Detroit last week. Can't tell much difference in the way in runs, but my fuel mileage has dropped off quit a bit. Could this be from the new EGR, or possibly something else? Thanks in advance!
     
    strato, Mar 6, 2015
    strato, Mar 6, 2015
    #1
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  3. Mar 6, 2015 #2
    mhyn

    mhyn Road Train Member

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    Northridge, CA
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    if its 14 L engine I suggest you to go to Detroit(not freightliner ) dealer. Ask them to adjust the turbo. there is a connection between egr valve opening and turbo's vans response.
     
    mhyn, Mar 6, 2015
    mhyn, Mar 6, 2015
    #2
    strato Thanks this.
  4. Mar 7, 2015 #3
    strato

    strato Bobtail Member

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    Apr 1, 2013
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    Thanks mhyn. I haven't heard that before, but it does make sense. Does Freightliner not know what they are doing when it comes to this procedure?
     
    strato, Mar 7, 2015
    strato, Mar 7, 2015
    #3
  5. Mar 7, 2015 #4
    mhyn

    mhyn Road Train Member

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    don't go to freightliner...they may not have test-ecm to hook up...go to Detroit diesel
     
    mhyn, Mar 7, 2015
    mhyn, Mar 7, 2015
    #4
    strato Thanks this.
  7. Mar 8, 2015 #5
    Bigray

    Bigray Road Train Member

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    Nov 23, 2007
    Tampa, Florida
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    So they replaced the EGR,but did they clean the system. I.E. do a egr tuneup ?
     
    Bigray, Mar 8, 2015
    Bigray, Mar 8, 2015
    #5
  8. Mar 8, 2015 #6
    strato

    strato Bobtail Member

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    Apr 1, 2013
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    Bigray, I have no idea if they cleaned anything, but I would be willing to bet the answer is "no". Thanks for the heads up.
     
    strato, Mar 8, 2015
    strato, Mar 8, 2015
    #6
  9. Mar 8, 2015 #7
    Bigray

    Bigray Road Train Member

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    Nov 23, 2007
    Tampa, Florida
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    There is a thread that goes into detail explaining EGR system. also some you tube video's showing how to maintain / clean Said system.

    watched them last night, Very informative.
     
    Bigray, Mar 8, 2015
    Bigray, Mar 8, 2015
    #7
    strato Thanks this.
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