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Thread: E38 Vett Fuel trim swings

  1. #1
    Tuner in Training
    Join Date
    Dec 2016
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    26

    E38 Vett Fuel trim swings

    Trying to help a friend if mine with his 2008 procharged vett (fast 85cc injectors)
    This car was tuned couple of years ago and it does not idle well.
    Car was lean at wot and we scaled the maf and cleared that up

    Problem that was pre existing and is still there is the stft.
    Car was adding 30% fuel at idle .
    rescale the maff and all good, drive the car for a bit and it may go to -30%
    Someone mind having a look?
    New to the E38
    Attached Files Attached Files
    Last edited by kirk tarrant; 08-05-2019 at 07:20 PM.

  2. #2
    Advanced Tuner jsllc's Avatar
    Join Date
    Sep 2015
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    Bozeman, MT
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    701
    Logs please. Need to see the issue.
    2012 ZL1 - Maggie Heartbeat, Port & Polish Heads, Custom Cam, Custom rotating assembly, steel sleeved LS9, No NOS and No water meth. 16psi
    810rwhp and 820rwtq 91 Octane 6400 rpm
    948rwhp and 951rwtq 105 Octane 6400 rpm
    999rwhp and 997rwtq on 60% Ethanol 6400 rpm

  3. #3
    Senior Tuner SultanHassanMasTuning's Avatar
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    Nov 2009
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    3,149
    toss those injectors and get a set with real data
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