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Thread: e67 question

  1. #1
    Tuner in Training
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    Aug 2014
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    e67 question

    has any one noticed it gets richer the faster you go. like 12.0 afrs in second gear then 11.8 in third and 11.6 in fourth as an example. car in question is an 2011 ctsv. so am i correct that there is a fuel enrichment vs gear or speed in the e67 that we cant change.

  2. #2
    Senior Tuner DSteck's Avatar
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    It's a result of MAF filtering rates.

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  3. #3
    Tuner in Training
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    Aug 2014
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    OK so what do people normally do just tune to desired afr in just third gear or fourth gear. And let first and second be slightly leaner. Or tune it till like second gear is to your desired afr and let the higher gears get richer. Or can I modify the filter rates till all gears stay the same.