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  1. #1
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    Autotune CHUGGING question...4000-6000rpm...

    Autotune up and running, ran great. Meeting all my target AFR's, except for when I would get above 7700rpm (stock 8100 ECU), the numbers would go up into the 13's...Which I can assume is just the duty cycle maxing out on my 42# injectors, with my FPR set @58 psi...I got 50's to toss in, so thats not an issue...

    So for the first half of my trip today, it ran great. Not one issue, held AFR's with no problem...We stopped, chilled for about 30 minutes, then we all turned around and went back...

    The river is now crowded with boats, cruisers, etc....Making it impossible to ride normal...I basically had to vary the throttle from 4000-7000 range for rough water for miles...But once on flat water, and I was able to hold constant throttle, she ran great...

    THEN, when I dropped under 6000, or once boost went away...it would CHUG, and hunt rpm's....Hold it at 5000 and it would drop to 4200, then up to 5800, then back to 4800, then 5600......it sounded like I was blipping the throttle constantly, but I was not moving it........Bring it to 6000+. and it would pull like a train and hold my AFR's with no issue....It like it wanted boost to be able to run right...

    Come to a stop, it idled fine...Bring it up to 3500, get on plane, and it was fine...cross 4000 mark, and it would chug up and down....I did get some smooth water, and tried to hold it at 5000...after about 10 seconds of surging, it leveled off and it was fine....but go up/down 200-300 from that point, and it surged...

    Could the Autotune have adjusted itself to when I was having to chop throttle constantly for 20 minutes????? My guess is MAYBE.....

    I have not had a chance to hook my laptop up to it to see what is going on.....
    Last edited by Danny; 08-21-2013 at 10:21 AM. Reason: Title change


  2. #2
    Moderator beerdart's Avatar
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    Auto tune only tunes +- 20% till you accept the tune then it will go another 20% look at the trim table and see if you are at 20%

  3. #3
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    I figured I needed to do something like that, this was the first time out on my ski...this year

  4. #4
    Moderator beerdart's Avatar
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    Yea mine did the same thing till I accepted the trim and let it trim again now its rock solid with a trim table of =- 5%

  5. #5
    Moderator beerdart's Avatar
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    Oh if you have the LCD you can trim on the fly.

  6. #6
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    I don't have the LCD, I went with a regular gauge...The LCD would make it easier...

  7. #7
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    Danny there was one for sale recently in classifieds

  8. #8
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    I'm not too worried about it. I got some fiberglass repair to do from running aground today (at 50+), so I might be done for the year...

  9. #9
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    Quote Originally Posted by Danny View Post
    I'm not too worried about it. I got some fiberglass repair to do from running aground today (at 50+), so I might be done for the year...
    Damn Danny that was a costly one tank trip!

  10. #10
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    Quote Originally Posted by thatdude596 View Post
    Damn Danny that was a costly one tank trip!
    It was running good. The new garrett core was really sucking the heat out, because my running temp would rise more than usual, sit about 5 degrees higher (my HX uses IC dump water)...So I know my air charge temp is really down now, compared to last year....and the water was 80, very warm still for us...My water lines and fittings were sweating...

    Its going to be sitting in the garage, with a fan blowing on the area all week, to dry that fiberglass out...I even plan to hit it with a heat lamp to make sure its dry...before I put any resin in there.........Sucks, but its only a toy.....

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