karmf

Discussion in '94-95 5.0 Tuning' started by NIN, May 6, 2007.

  1. NIN New Member

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    My karmf's are getting better except for at idle. What is different at idle. I've been adding fuel to the fuel stabilized table and seems to help under acceleration. But at Idle the karmf readings are exactly the same.

    Thanks,
    Tom
    NIN, May 6, 2007
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  2. blksn955.o Founding Member

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    IIRC there are a few idle specific tables (might have been the fox stuff though). You might want to try messing with your transfer downlow or the slope instead of the table. Remember one of the slopes is mainly for idle so maybe cutting it back will help. I would just mess with the transfer/slope as they are more important than the table (or should be setup as best as can be before messing with the tables)

    I really have not had any issues with driveabiltiy/idle at all though so I really have not messed with it...all my issues have been WOT.
    blksn955.o, May 7, 2007
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  3. final5-0 New Member

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    Well Tom

    At idle and light load cruise conditions, many things can come into play as you are in C L which means most sensors are being used for optimum af ratio.

    I'd start off with the mechanical stuff first :D

    I see no inj's, or maf so I guess you are still using the oem stuff :shrug:

    I don't know if it would be wise to invest a lot of time in finding a stable C L
    tune cause IMHO, 19's are not enough to feed your combo. When you move
    up to larger inj's, you most likely will have to redo some of those efforts.

    anyway .... I'd look into these things in this order ... generally speaking :)

    Dizzy at 10 and fuel pressure at oem value or just remove the afpr.

    Make sure you got no v leaks, exhaust leaks, faulty wiring connections, etc

    Make sure your maf and isc are clean and functioning correctly.

    Look into the relationship between tb blade opening and tb bleed screw

    Now for the pcm :D

    I'd then start off looking at:
    tb airflow scalar
    isc neutral idle air flow function

    Here are other things that can be used to obtain a stable idle:

    inj slopes
    inj breakpoint
    inj offsets

    After all the above ... you may need a slight tweecing to the maf curve at
    the points at and around idle.

    As you most likely already know ... You watch your K's for verification of
    your tweecs.

    You can find info about these topics on this site and EEC Analyzer has very
    good info as well.

    Grady
    final5-0, May 7, 2007
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  4. NIN New Member

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    What size inj. to you recommend with my combo and will I need more pump.

    Thanks,
    Tom
    NIN, May 7, 2007
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  5. final5-0 New Member

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    I'd think a 190 pump and 24's would be more suitable for what you now got.

    Remember, you tune at only 39lbs of pressure :)
    so
    19's really won't feed much additional hp

    Ford doing 24's on the Cobra kinda shows the same reasoning IMHO :D

    Now ... if you wanna do some more things like cam, tb, maf, and the like as
    most do with a NA h/c/i combo and shoot for 300 to the wheels or a
    bit better ... then I'd go with a 255 intank pump and 30's

    Grady
    final5-0, May 7, 2007
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