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Thread: 6.4l vgt not adjusting

  1. #1
    Tuner in Training
    Join Date
    May 2015
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    20

    6.4l vgt not adjusting

    Okay, So i went to turn my vgt off at idle. When I change the table from 85 to 0 in the sections it changes nothing. Any thoughts here?
    1999 chevy suburban 7.4l on 40's
    2006 chevy 2500hd duramax
    2004 chevy trailblazer wife's wheeler
    1999 ford f250 7.3l super duty
    2008 ford f350 6.4l super duty
    1994 chevy s10 4.3 vortech heads w/ tbi intake stock plan to bag one day
    2010 bmw 535xi wife's DD

  2. #2
    Tuner in Training
    Join Date
    May 2015
    Posts
    20
    So I logged truck and it is 95% closed on vgt at idle with 700rpm and 70 torque. I went into duty cycle changed that area to 0. No change, but i noticed it called for 85% in that table. So then i went looking under egr tables it shows 95% so ok that sounds more like the tables im looking for. Zeroed that table out where needed. Nope that did not work either. Why is vgt not changing to what I change it to in the tables at this point?

  3. #3
    Tuner in Training
    Join Date
    May 2015
    Posts
    20
    Okay so in case some one else finds this. The ebp tables need to be zeroed out in idle range as well as vgt. The ecm must use ebp as its core tables. The vgt is secondary. Now if I could just figure out why when I updated hpt I lost my egr temp pid and it will not populate i would be happy.