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  1. #1
    Michigan sn-95's Avatar
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    Will a new air set up cause a too lean condition?

    Will running a new air setup cause a 4-tec to be too lean? or does the ECU compensate for the extra air? I guess what I'm asking is "does the extra 150 RPM's come from purely leaning out the mixture?" I'm sure this has been covered in another post, but I didn't find it.


  2. #2
    mac_man_luke's Avatar
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    Stock ECU has a bit of scope in the ECU for changes and air intake is easily in this range.

  3. #3
    Michigan sn-95's Avatar
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    Quote Originally Posted by mac_man_luke View Post
    Stock ECU has a bit of scope in the ECU for changes and air intake is easily in this range.
    Thanks. That is exactly what I wanted to know.

  4. #4
    !!!! wave jumper !!!! 05_RXP's Avatar
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    i would say it all depends on what set up your are talking about i went from the riva 3" system that ran an afr of 11.9-12 to the 4" system that ran from 12-12.1 with same temps and roughly same humidity

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