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Thread: Weird Lean Spike 2300-2600rpm

  1. #1
    Tuner
    Join Date
    Feb 2021
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    Fl panhandle
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    66

    Weird Lean Spike 2300-2600rpm

    Hey guys, I have a 2015 6.4L hemi with a built bottom end and a comp stage 2 blower cam with a Whipple. It has a fore triple pump system and FIC1650s, and we have verified that there is no drop in fuel pressure. I have tried to add a bunch of fuel in the commanded PE table and in the ve table (separately and together), and nothing is working. I thought it might be transient, but if I start the pull at 1700rpm, then it'll be a fine but lean spike at 2300-2600rpm and then go back to commanded EQ. If I start the pull at 3000rpm, then there's no problem. I also had this problem a couple of years ago on a vortech supercharged challenger that we had a remote tuner do on our dyno, and it did the same thing, but weird to see a Whipple car doing the same thing. One of my tunes and logs are attached. The wideband channels from an aem x series OBD2 setup. Thanks for any help! Trying to get this spike figured out before we go e85 and turn the car up and for future tunes because this has been a common thing for me, apparently lol.
    Attached Files Attached Files
    2015 Sierra 4wd CC L83/6l80 combo: High Flow Filter, Catback
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