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OD light flashing and surging in reverse

Discussion in 'Ford Trucks' started by 1982atm, Jan 23, 2014.

  1. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    i have a 2003 f250 4x4 ccsb with a 7.3 diesel it has around 160k miles.
    The OD light flashes intermittently and also it has a intermittent symptom where the engine surges in reverse. when it does the surging its only in reverse and i have to sorda feather into the pedal ...

    Anyone ever had this happen?

    my mechanic checked the obd11 port with a snap on computer thing and found no codes
     
  2. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    That scanner if its a MODIS or vantage can find both of your problems.

    If its a little plug in scanner it generally won't
     
  3. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    it was a big scanner i think it was a modis.. but showed no codes
     
  4. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    the od light was not flashing when we scanned it
     
  5. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,615

    Most scanners need separate updates to read tranny codes. OD light blinking means a code should be stored. Common problem is the sensor in the rear diff and tranny harness.
     
  6. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    ever heard of the surge problem
     
  7. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    Use live data for both problems. Surging could be anything from fuel to air problem
     
  8. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    MODIS will read them. Unless its an ancient version which I doubt.

    On a side note, the update is 1800 each version
     
  9. White Gardens

    White Gardens 2000 Club Member
    Messages: 2,665

    With the truck surging in Reverse, and reverse only, and the od light flashing....... I'm willing to suspect something is up with the tranny.

    The surging might just be the tranny slipping or something.


    .......
     
  10. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,615

    When OD light is blinking the tranny is "limp" mode. This bumps tranny pressure to help protect it's self. This could possibly cause other issues. When my accumulator body had a sticking valve it caused all types of strange things. I would find some one able to get the tranny codes out of the computer. Beware that most tranny shops will just tell you to rebuild it.

    Is/was it still shifting fine when light was blinking?
     
  11. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    yes shifting fine when blinking maybe a little firmer than normal .... but the surge in reverse is not a slipping issue it seems to be the engine cutting in and out almost like a electronic issue IDK
     
  12. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    Use the MODIS. You have the tool at your disposal. Everything else is just guessing.

    Well my truck did this...
    My uncles cousins truck did this
    ..
    My dads brother in laws cousins truck did this...

    Save your time and use. Live data is your friend
     
  13. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    its not mine but Ill ask him if i can use to do that
     
  14. mwalsh9152

    mwalsh9152 Senior Member
    Messages: 434

    it could be the convertor locking and unlocking when youre in reverse that is causing the surge. One thing you can try: when it is surging, try to rest your foot on the brake pedal just enough to engage the brake lights, this should unlock the convertor. It the surge goes away, then you know its a locking issue.
     
  15. 1982atm

    1982atm Senior Member
    from indy
    Messages: 146

    Not the converter.. its the engine surging