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Thread: Lean Cruise Setup for Australia & New Zealand

  1. #1
    Member neil's Avatar
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    Default Lean Cruise Setup for Australia & New Zealand

    I would like to start a thread on setting up Lean Cruise for the Australian and New Zealand PCM's.
    Also any other information pertaining to tuning for fuel economy.
    I would like to see a resource that is located in one area rather than a collection of threads so everyone could have easy access to it.
    Maybe Paul could setup a new section on the forum.

    Regards,

    Neil.

  2. #2
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    Hi there Niel, I have played around with lean cruise on the last few Holdens I have tuned and found how it works with trial and error really. I initially thought that lean cruise used the STFT to "remove" a set amount from the E Ratio via the O2 sensor trims etc as per outlined in the Lean cruise map. I quickly realised that when lean cruise conditions are met that the STFT turns off and flat lines and the mixture starts altering as per the lean cruise map if you are in the right MAP and RPM points at the time.
    The thing is, the amount removed from the EQ Ratio needs to be set up for best results with a wide band of course and I guess your VE table needs to be spot on to get predictable results from lean cruise effects. It took a lot of reflashing and mucking around but I got the idea and decided just to turn it off, like the later 2005 calibrations did, and let the STFT's keep working instead. Using the Road runner would make setting up lean cruise a piece of cake but I haven't got one of those yet :(
    The cars with lean cruise turned off still returned excellent MPG figures so I don't see what all the fuss is about with "lean cruise"......
    comments.........

  3. #3
    EFILive Reseller ringram's Avatar
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    I kick mine in faster and sooner and tell it to go to 15.4:1
    Its a lot leaner stock, but a few recon too lean hence Ive richened it up a tad.
    Get EFILive in europe (http://www.efilive.eu).
    2007 Escalade ESV L92 6.2L VVT.
    2014 VF SV LS3 Maloo.

  4. #4
    EFILive Crew Site Admin Tordne's Avatar
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    I think (looking at the stock table) that it tries to run as lean as 17:1
    Andrew
    EFILive Crew


  5. #5
    Member neil's Avatar
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    Default Air/Fuel Ratios

    Hi,
    There's an interesting article at the following address on Autospeed magazine
    Tuning Air/Fuel Ratios

    http://autospeed.drive.com.au/cms/A_1595/article.html

    Regards,

    Neil.

  6. #6
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    Anyone feel up to posting what their LC settings are?

  7. #7
    Lifetime Member Garry's Avatar
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    I went up to 15.4 in Table B3647 (COS5) for low MAP/RPM ...
    Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)

  8. #8
    Member neil's Avatar
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    Hi,
    Can you use the bi-directional controls to setup Lean Cruise?
    If so what procedure would you use?

    Regards,

    Neil.

  9. #9
    EFILive Crew Site Admin Tordne's Avatar
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    Quote Originally Posted by neil
    Hi,
    Can you use the bi-directional controls to setup Lean Cruise?
    If so what procedure would you use?

    Regards,

    Neil.

    Not really, you are wanting a RoadRunner already and you haven't even been allowed to open the V2 that's under the tree
    Andrew
    EFILive Crew


  10. #10
    Member neil's Avatar
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    It's getting a bit much.
    There might be an empty box under the tree at Christmas.



    Neil.

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