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Thread: hot restart flag

  1. #1
    Fuel Injected!
    Join Date
    Apr 2020
    Posts
    59

    hot restart flag

    using a 16197427 ecm with BDYT memcal ($od) on a 4.3 liter tbi engine,
    does anyone know what triggers the "hot restart flag" and what happens when it is active?

  2. #2
    Fuel Injected! sturgillbd's Avatar
    Join Date
    Jun 2012
    Location
    Big Stone Gap, VA
    Age
    50
    Posts
    504
    Hot restart flag is used for what it describes with its name. $0D has fuel modifiers based on temp etc. Here is a section from the disassembly for $0D.


    ;---------------------------------------------
    ; CRANK FUEL MULT Vs. Vs. RPM IF HOT RESTART
    ;
    ;
    ; TBL = MULT * 256
    ;---------------------------------------------
    ORG $4DAC ; MULT RPM
    ;----------------------------------
    L4DAC FCB 255 ; 0.996 0
    L4DAD FCB 255 ; 0.996 100
    L4DAE FCB 166 ; 0.648 200
    L4DAF FCB 166 ; 0.648 300
    L4DB0 FCB 128 ; 0.500 400
    L4DB1 FCB 128 ; 0.500 500
    L4DB2 FCB 128 ; 0.500 600
    L4DB3 FCB 128 ; 0.500 700
    L4DB4 FCB 128 ; 0.500 800
    ;----------------------------------------------

    You can search the disassemblies here for lots of Parameters in $0D.
    http://www.gearhead-efi.com/Fuel-Inj...7&d=1331604187

  3. #3
    Fuel Injected!
    Join Date
    Apr 2020
    Posts
    59
    thanks for the heads up! work has been hectic so i havent had opportunity to dig in yet!

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