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Thread: Reading my Wideband Through The AC Pressure PID, now Fans are always on

  1. #1
    Potential Tuner
    Join Date
    Sep 2012
    Posts
    9

    Reading my Wideband Through The AC Pressure PID, now Fans are always on

    Hopefully someone can give me an easy work around for this.

    I recently wired my wideband through the AC pressure wire to log data for tuning after my H/C swap.

    Since then my high speed fans are constantly cycling on and off even on cold start. I assume it is because the PCM is seeing voltage at the AC pressure switch and thinks the air is on so it turns on the fans.

    What I can't figure out is how to work around this so the fans do not turn on. Since I have done this my idle begins to jump around everytime the fans turn on and off. (I did pull the Fan 2 relay which helped but did not eliminate the issue)

    FYI, this is just temporary until I am happy with the tune then I will want my AC back but I may hook up a 3 way switch to toggle between the 2 wires for future tuning.

    Thanks in advance for any help.

  2. #2
    adjust the cooling fan AC pressures in the tune when logging with the wide band.