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Thread: PE Mode Controls All Closed-Loop Fueling

  1. #1
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Default PE Mode Controls All Closed-Loop Fueling

    Does B3618 or B3605 Control Commanded Fueling..

    Test: 2002 LS1B OS 12212156

    Did a series of 6 Tunes (2 Closed-Loop, 4 Open-Loop) to see which Table controls Commanded Fueling:

    1. MAF Enabled B3618 set to EQ 1.00. B3605 set to 1.13



    Result: B3618 Controls Commanded EQ.

    2. CLSD (MAF Disabled). B3618 1.00 EQ. B3605 set to 1.13





    Result: B3618 Controls Commanded EQ.

    3. Open-Loop SD (MAF Disabled). B3618 Set to 1.00 EQ. B3605 Set to 1.13



    Result: B3605 Controls Commanded EQ.

    4. OLSD B3618 Set to 1.16 B3605 Set to 1.13



    Result: Commanded EQ follows Richer of B3605 & B3618

    Test 5: OLMAF B0120 Set to 400 RPM, B3618 Set to 1.00, B3605 Set to 1.13





    Result: Commanded EQ follows B3605

    Test 6: OLMAF, B0102 Set to 400 Rpm, B3618 Set to 1.16, B3605 Set to 1.13



    Result: Commanded EQ follows Richer of B3605 & B3618

    Discussion: This has been a controversial topic. When does Table B3618 control fueling, or when does Table B3605 control Commanded EQ.. and when does the PCM pick the richer of the two?

    Result: In ALL cases (MAF-Enabled or Disabled), in Closed-Loop B3618 controls ALL fueling or Commanded EQ.

    Only in Open-Loop does the PCM pick the 'richer of the two'.

    Summary:

    PE mode fueling is commanded by:
    - CLMAF : B3618
    - CLSD : B3618
    - OLMAF : richer of B3618, B3605, B3647
    - OLSD : richer of B3618, B3605, B3647

    Or more simply, PE mode fueling is commanded by:
    - CL: B3618.
    - OL: richer of B3618, B3605, B3647.

    Or, even more simply, PE fueling is commanded by:
    - the richest of the active fueling tables.
    Note:
    - in CL, the active fueling tables at WOT would be B3618.
    - in OL, the active fueling tables at WOT would be B3618 and B3605 (B3647 for COS).


    Last edited by joecar; April 20th, 2015 at 11:50 PM.
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  2. #2
    Lifetime Member minytrker's Avatar
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    Default

    I always make both tables match.

  3. #3
    Joe (Moderator) joecar's Avatar
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    Good job
    Last edited by joecar; June 19th, 2011 at 08:17 AM.

  4. #4
    Joe (Moderator) joecar's Avatar
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    Default Summary of fueling...

    PE mode fueling is commanded by:
    - CLMAF : B3618
    - CLSD : B3618
    - OLMAF : richer of B3618, B3605, B3647
    - OLSD : richer of B3618, B3605, B3647

    Or more simply, PE mode fueling is commanded by:
    - CL: B3618.
    - OL: richer of B3618, B3605, B3647.

    Or, even more simply, PE fueling is commanded by:
    - the richest of the active tables.
    Note:
    - in CL, the active tables at WOT would be B3618.
    - in OL, the active tables at WOT would be B3618 and B3605 (or B3647 for COS).
    Last edited by joecar; January 2nd, 2015 at 04:39 PM.

  5. #5
    Lifetime Member Mr. P.'s Avatar
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    And what if your OS doesn't have a B3605??
    2003 Silverado SS, with Novi-1500 "CAI mod"
    EFILive V 7.5 COS-3 (OLSD, for now!)

  6. #6
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Quote Originally Posted by Mr. P. View Post
    And what if your OS doesn't have a B3605??
    Hi, Mr.P:

    Best answer would be for a COS User to test it out. I ran 6 tests on a regular COS...

    Best I can figure is that closed-loop never picks an 'Open-Loop' Type Fueling Table, but relies on the PE Modifiers..I am sure Joecar's Summary would probably be correct for iterations of Open-Loop, but as always testing is the best method..
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  7. #7
    Joe (Moderator) joecar's Avatar
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    Mr.P,

    B3647 behaves exactly like B3605.

  8. #8
    Joe (Moderator) joecar's Avatar
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    I updated post #4 here: Summary-Notes

    Basically: entering PE from CL mode retains CL mode during PE.

    This now makes sense regarding LTFT's being applied during WOT (negative trims are first rounded up to zero).

  9. #9
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Quote Originally Posted by joecar View Post
    So is this summary a correct statement:

    PE mode fueling is commanded by:
    - CLMAF : B3618
    - CLSD : B3618
    - OLMAF : richer of B3618, B3605, B3647
    - OLSD : richer of B3618, B3605, B3647

    Or more simply:
    PE mode fueling is commanded by:
    - CL: B3618.
    - OL: richer of B3618, B3605, B3647.
    Yes!
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  10. #10
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by joecar View Post
    I updated post #4 here: Summary-Notes

    Basically: entering PE from CL mode retains CL mode during PE.

    This now makes sense regarding LTFT's being applied during WOT (negative trims are first rounded up to zero).
    This means that B3605/B3647 are not active (because CL is not exited).

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