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  1. #1
    New Member
    Join Date
    May 2011
    Posts
    10
    Tractor
    John Deere 6400

    Default John deere 6400 rough starting

    My John Deere 6400 runs real rough and often dies when u first start it. It smokes pretty bad also when it doing it. It always clears up and runs fine the rest of the day. Any ideas?

  2. #2
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Posts
    4,770
    Location
    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: John deere 6400 rough starting

    Most likely fuel is draining back to tank when engine isn't running. Hole in fuel line or bad check valve. I think I've read about deteriorating rubber fuel lines on the newer JD tractors.

  3. #3
    Veteran Member JESSE1's Avatar
    Join Date
    Nov 2003
    Posts
    1,183
    Location
    Kilgore, Texas
    Tractor
    JD 6400

    Default Re: John deere 6400 rough starting

    You need to change out the fuel line from the tank to the fuel filter. My 6400 would not start until I bled air out of the fuel filter. Found out the fuel line had deteriorated and had fuel seeping out. Changing out the fuel line solved the problem.
    6400 John Deere w/ cab, JD 535 Baler, 997 ZTR Diesel, 72" 7 Iron deck, John Deere 855D 4x4 Diesel Gator

  4. #4
    New Member
    Join Date
    May 2011
    Posts
    10
    Tractor
    John Deere 6400

    Default

    Thanks for your help, it was a bad fuel line.

  5. #5
    New Member
    Join Date
    Apr 2013
    Posts
    2
    Location
    Forksville
    Tractor
    6400 JD diesel

    Default Re: John deere 6400 rough starting

    My JD 6400D has starting problems; I replaced the starter since it seemed bad. But to no advantage. The battery is brand new and charged. When I turn the key to start, sometimes I get no response. If I keep playing with the ignition long enough I can finally get it to start. But it acts like the solenoid or starter is bad which are brand new. Any ideas?
    John

  6. #6
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Posts
    4,770
    Location
    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: John deere 6400 rough starting

    Check to be sure the starter relay(parts key #1) is operating properly and doesn't have a loose wire on a terminal. I suppose you have checked/cleaned/tightened ALL FOUR battery cable connections??
    Attached Thumbnails Attached Thumbnails -lx014665_______un01jul96-gif  

  7. #7
    New Member
    Join Date
    Apr 2013
    Posts
    2
    Location
    Forksville
    Tractor
    6400 JD diesel

    Default Re: John deere 6400 rough starting

    Thanks. I will check that out. Yes battery terminals are clean n tight.

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