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Ford LRG - 425 starting problem

Discussion in 'Other Construction/Demolition Equipment' started by CharlieVT, Jun 15, 2017.

  1. DavidL

    DavidL Active Member

    Joined:
    Jun 26, 2017
    Messages:
    32
    Location:
    Michigan
    Mine doesn't have a map...parts diagram doesn't call for one. I thought that might be part of the ECU retrofit kit.
     
  2. Birken Vogt

    Birken Vogt Charter Member

    Joined:
    Nov 30, 2003
    Messages:
    1,277
    Location:
    Grass Valley, Ca
    On the generator engines I work on I see the tube for the MAP but have never seen one hooked up so they either just use the same body for the ignition controller without MAP installed or they just run it fully retarded all the time, with the timing fixed.
     
  3. DavidL

    DavidL Active Member

    Joined:
    Jun 26, 2017
    Messages:
    32
    Location:
    Michigan
    According to my manual...the timing is adjusted by engine temp and rpm alone (from memory).
     
  4. CharlieVT

    CharlieVT Member

    Joined:
    Oct 23, 2014
    Messages:
    16
    Location:
    New England
    Okay Gents,
    My ignition problem solved. Thanks for the replies and suggestions.
    Picture of the old ignition module I removed, not easy to see in this pic, but partly hidden from view is the nipple for connecting vacuum hose, so the "MAP" was built into this unit. (I hadn't thought of this vacuum connection as a MAP sensor) : ManliftOldESC.JPG

    This one module was replaced by three items, new spark control module, a stand-alone unit for the vacuum connection, and wiring harness that connected to these new units, the original wiring harness connector for the module that was removed, and a new connector to the crankshaft position sensor.

    The original wiring harness connector for the crankshaft position sensor was unplugged and taped off, unused.
    There was one unused connector on the new wiring harness. I suspect this harness is used for both carbureted (as mine is), and fuel injected versions of this engine. I suspect that this one unused connector would be used to connect to fuel injection circuitry in the case of a fuel injected engine.
    Picture of the new components: ManliftNewESC.JPG

    The parts came without any installation instructions, but the Gentleman at Powertech Engines told me about the need to connect to the crankshaft position sensor and disconnect the original wiring, and that there would be an unused connector on the harness. With that info, it was easy to match up all the other connectors.
    Again, thanks for the suggestions.
    Hope my post helps someone in the future with similar problem.
     
    Last edited: Aug 21, 2017 at 1:08 PM
    thepumpguysc likes this.
  5. thepumpguysc

    thepumpguysc Senior Member

    Joined:
    Mar 18, 2010
    Messages:
    2,076
    Occupation:
    Master IP rebuilder
    Location:
    Sunny South Carolina
    Very good & informative post.. thank you for coming back & telling us what you found & what solved the issue..