MPT Tune Officially out

Discussion in 'V6 3.7L Engine / Mods: Bolt-ons, Exhaust, Tuning' started by davejonnes, Apr 15, 2016.

  1. Baso

    Baso Active Member

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    Sorry I seemed to have misread your first post as I wasn't too focused when I checked it. Yeah I get what you're saying now, thanks.
     
  2. Nagare

    Nagare Well-Known Member

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    Just wondering if any of you have had an issue with the car not doing the 4-5 shift when going WOT? Got a tune revision from MPT after the 3.73s and thermostat and noticed it last night when datalogging. It does generally seem to hang on a little long to each gear (revving all the way to 7k, but I want to dyno again to see where the power starts to dip). Also noticed if I'm cruising above 90 and mash the pedal....nothing happens. If I'm cruising below 90 and mash the pedal, it'll drop to 4th and move. Mentioned all of this to them and probably going to be waiting until Tuesday or Wednesday for a revision, just curious if anybody else has noticed similar before.

    Highest knock sensor reading throughout the logs was 2.02 (happened right after I forced the shift to 5th) which is much better than last time I was really looking my logs! Best was -7.25.
     
  3. roryedits

    roryedits Well-Known Member

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    I haven't noticed anything with mine, I'm also still running the stock 3.15 gears and when I push it I use the paddles instead of normal sport mode. THOUGH, two times now i've floored it in D and had it go all the way to 7492 before shifting, one of which time the tactometer flew and hit the pin at 8k (tuner said it didnt pass 7500 though).
     
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  4. Nagare

    Nagare Well-Known Member

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    Yeah I could have sworn mine was sitting at 7500 but datalogs show it was like 6992 at the highest. Don't remember it with my 3.15s either.

    Normally I would be using the paddles for it to have more fun, but that won't really address any issues with the trans tuning (if they exist). I'm hoping I'll get an answer/update from MPT tomorrow and either do more logs tomorrow or Wednesday night.
     
  5. Nagare

    Nagare Well-Known Member

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    #805 Nagare, Mar 26, 2019
    Last edited: Mar 27, 2019
    Here's the response I got back today (along with a new revision):

    That is in response to this message to them:
    Not sure why there'd be anything to manually shift in an auto tune on D, but I'll see if this fixes the issue or not later today.

    edit » no testing yesterday because it was pouring. Today is up to 5% chance of rain most of the day so hopefully it stays clear and I can datalog tonight.
     
  6. Nagare

    Nagare Well-Known Member

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    Still having the same issue on the revised tune and even on a stock tune no limiter that Mike sent. Anybody else (auto) have a similar issue? Not something you'll really notice in everyday driving...Above 90 then hit it, stays in 6th and crawls. Below 90 then hit it, shifts to 4th and goes.

    Also, going back and forth between the 93PRX tune and the "Stock Tune no Limiter" highlights how much better the MPT one is. Way less responsive and you can just feel that it is down on power. Normally when I go out at night there isn't much going on, but last night all kinds of people wanted to go to Mexico and I just didn't want to embarrass myself like that lol.
     
  7. USMCtoARMY

    USMCtoARMY Well-Known Member

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    First world auto trans problems bruh! Manual for Life SON! Lmao.

    In all seriousness, that sucks man. I hope you get it sorted cause I would be pissed and my OCD would be on hyperdrive till I figured it out and fixed it. With that, nothing further to add other than empathy cause on the real i never drive autos unless its my family minivan/suv.
     
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  8. Nagare

    Nagare Well-Known Member

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    Yeah it's making me wonder if it is actually a trans issue possibly, but it shifts in and out of 5th just fine in regular driving, just refuses to (automatically) downshift out of 6th above 90.
     
  9. RebelTX

    RebelTX Member

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    Word of advice, especially for those of you swapping tunes. Make sure you put AT LEAST 30 miles on the tune before you data log it.... this allows your ECU to "learn" the tune and make whatever adjustment its going to. Then data log and allow your tuner to make changes. Lots of auto cars having shifting issues are due to this. Put some miles on, make a pull or 2, then data log... i guarantee your odds of getting your shift points where you want them will increase.
     
  10. Nagare

    Nagare Well-Known Member

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    Since that's probably geared at me, I know about the 30 miles to relearn and all that, but (imo) that explains wonky and inconsistent shift points, not a complete refusal to shift. And the same pattern happens on both stock and MPT tune, left in auto.
     
  11. RebelTX

    RebelTX Member

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    it will cause a refusal to shift if the ECU has lowered the RPM limit to a point below where the shift command is at WOT.... so if the shift point is set for 7500RPM and the ECU limits to 7300, you will never get a shift until you back off the throttle a little where the shift point is lower. usually you will bounce off the limiter hard a few times then the shift will take but thats obviously not ideal
     
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  12. RebelTX

    RebelTX Member

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    it used to happen to me lots on my turbo and nitrous 3.7L when we first started doing WOT tuning. the RPM's would climb so fast we had to command it early to "catch" the RPM before it hit the limiter. i might have some videos of it happening during races
     
  13. Nagare

    Nagare Well-Known Member

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    This is like 3k, there's no bouncing at the limiter because it refuses to go down in gear at all. I kinda see what you're talking about and that was an issue at one point on my V3 revision where the 4-5 (auto) shift wouldn't happen at WOT, but I'm stuck on what's happening for me (won't leave 6th above 90).
     
  14. MarkDMKC1974

    MarkDMKC1974 Well-Known Member

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    Was looking at either these guys, MPT or Bama from American Muscle.

    My problem though is, even the stations that say they carry 93 only have 91 listed on there pumps.

    Do they make a 91 tune? haha
     
  15. Nagare

    Nagare Well-Known Member

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    Yes, in some areas 91 is the highest available. It's basically a toned down version of the 93 with less aggressive timing.
     
  16. MidwayJ

    MidwayJ Well-Known Member

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    I decided to see what my never tuned car does in this scenario, and I got a damn ticket for 98 in a 70 zone!





    Haha. Not really, but it would just be my luck. Sorry to hear you are still having this issue.
     
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  17. Nagare

    Nagare Well-Known Member

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    This was tied to either my gear or tire size change settings in the BCM through Forscan. I reverted them both back to stock, reapplied my tune, and had power again above 90. After going for awhile, it kinda seemed like the issue was coming back, but my tune doesn't have the ECU/PCM strategy included in it so with the tune applied...I can't do anything in Forscan to see if the U0422 code came back again.

    Will probably reach out to MPT later this week after trying it again tomorrow.


    Also, a reminder to not fall for cheap gas. I filled up at a Westar because the price was 50 cents cheaper than most other stations, even filled the tank all the way. IT WAS TERRIBLE. Watching my knock sensors on the X4 I got as high as 9! After wearing it all out tonight and filling up with good gas again, back to my normal (probably would have been 0 but I was testing things and holding 4th at 120-125 does not make my knock sensors happy so it jumped to 3.9).
     
  18. Baso

    Baso Active Member

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    Has anyone's auto ever started acting weird after retuning their car? Couple days ago I was waiting for a friend in the car so I decided to mess around with the tuner while waiting. I ended up increasing the rev limiter in neutral and the car had to redownload the tune which I think reset the ECU's learning pattern memory or whatever Ford calls it. Now the car is short shifting at 3k even when in Sport Auto mode and well over half throttle. Should I be worried or is that just the car learning my driving habits?
     
  19. Nagare

    Nagare Well-Known Member

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    Relearning driving habits, you can either reflash again or do a KAM reset, I think both have a similar result. You're supposed to drive 30 miles or so "normally". I've never gotten an answer on if normal is most people normal or your own normal driving though!
     
  20. Baso

    Baso Active Member

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    Now that you mention it I did actually forget about the 30 miles thing. Went ahead and floored it right after tuning. Will try reflashing or resetting. Thanks.
     
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