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UCON Flex Advanced Engine Management System

Discussion in 'Performance and Tuning' started by gray223, Jul 5, 2014.

Page 38 of 86
  1. Aug 15, 2017 at 4:35 PM
    #741
    GT7

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    GT7 One piece at a time

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    I didnt even think to reset my ecu by disconnecting the battery, I did it for 3 mins and the cel for misfire hasn't reappeared yet
     
    GT7, Aug 15, 2017
    #741
    Skootter14, jojotoo, oni06 and 1 other person like this.
  2. Aug 15, 2017 at 5:11 PM
    #742
    Roostfactor

    #742
    Roostfactor Well-Known Member

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    GT7, how many miles/years on your sc?
    Check your intercooler reservoir. If it's low then you possibly have a leak. If you do have a leak but is not visible then its most likely internal from one of the two orings pictured as that is the only place the intercooler coolant system isn't visible from the outside.
    They should be standard orings since they are only exposed to coolant so I would just get a Harbor Freight oring set for $10 and put in the orings that fit.
    Anyone know if engine coolant injection would cause a p0300 misfire?
     
    Roostfactor, Aug 15, 2017
    #742
  3. Aug 15, 2017 at 6:07 PM
    #743
    GT7

    #743
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    Already got the o-rings and plan to put them on tomorrow. 38,000 on truck 20,000 sc.

    Also been checking res frequently. I think I do have a leak because it keeps disappearing but slowly
     
    GT7, Aug 15, 2017
    #743
    Roostfactor[QUOTED] likes this.
  4. Aug 15, 2017 at 6:17 PM
    #744
    Roostfactor

    #744
    Roostfactor Well-Known Member

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    Interesting, is the one bolt that hold the intercooler to cover tight?

    Seems pretty early for orings to take a set. It happens though.
     
    Roostfactor, Aug 15, 2017
    #744
  5. Aug 15, 2017 at 6:25 PM
    #745
    GT7

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    Ill check it all tomorrow and report back
     
    GT7, Aug 15, 2017
    #745
    Roostfactor likes this.
  6. Aug 16, 2017 at 12:31 PM
    #746
    GT7

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    Couldn't find any leaks in the supercharger coolant system, So i will be replacing the o-rings tonight
     
    GT7, Aug 16, 2017
    #746
    oni06 and loginfailed like this.
  7. Aug 16, 2017 at 7:59 PM
    #747
    GT7

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    Well here they are... idk if they are bad but im changing them

    IMG_7773.jpg
     
    GT7, Aug 16, 2017
    #747
  8. Aug 16, 2017 at 8:05 PM
    #748
    GT7

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    New ones

    image.jpg
     
    GT7, Aug 16, 2017
    #748
  9. Aug 16, 2017 at 8:12 PM
    #749
    GT7

    #749
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    My orange seal is wet, I can't remember if thats the way it was last time i took it off
     
    GT7, Aug 16, 2017
    #749
  10. Aug 16, 2017 at 10:14 PM
    #750
    StOrMyThEtAcO

    #750
    StOrMyThEtAcO @stormythetaco

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    Mine was wet too, oily substance on it. That was pre oil catch can though. Idk what it's like now.
     
    StOrMyThEtAcO, Aug 16, 2017
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  11. Aug 16, 2017 at 10:25 PM
    #751
    GT7

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    I have and oil catch can too.

    I went for a 10 min drive with new o-rings and added more coolant to the res to refill the internal heat exchanger. It drove great and no cel yet.

    Only problem is I have been in Phoenix for 3 days and it has now started to have a very long cold or hot start about 60% of the time. So after installing new o-rings it still had a long start.
     
    GT7, Aug 16, 2017
    #751
    Skootter14 likes this.
  12. Aug 17, 2017 at 2:10 AM
    #752
    StOrMyThEtAcO

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    StOrMyThEtAcO @stormythetaco

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    I'm sure the o-rings were just wore out
     
    StOrMyThEtAcO, Aug 17, 2017
    #752
  13. Aug 17, 2017 at 5:26 AM
    #753
    Skootter14

    #753
    Skootter14 Upon my signal, unleash Hell

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    long start....??? Just taking longer to turn over?
     
    Skootter14, Aug 17, 2017
    #753
  14. Aug 17, 2017 at 7:37 AM
    #754
    GT7

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    Yes, The ucon makes starting a little longer while synching to the ecu. Most of us know that.

    My truck now has a very prolonged start, sometimes 3-5 seconds. Ill take a video today
     
    GT7, Aug 17, 2017
    #754
  15. Aug 17, 2017 at 8:49 AM
    #755
    Skootter14

    #755
    Skootter14 Upon my signal, unleash Hell

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    well now you can add one more to the list. . . haha
     
    Skootter14, Aug 17, 2017
    #755
    GT7[QUOTED] likes this.
  16. Aug 17, 2017 at 9:07 AM
    #756
    Roostfactor

    #756
    Roostfactor Well-Known Member

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    The difference in mine is very minimal...almost unnoticeable.
    Hart to tell from the pic but your original orings looked fine. If they were still round (not flattened) then that's most likely not the problem.
    The Orange seal was wet with what, coolant?
    How did the intercooler surface look where it mates up to the orings? Any nicks, scratches, corrosion to affect the seal?
    It's possible you have a pinhole leak in your intercooler.
     
    Last edited: Aug 17, 2017
    Roostfactor, Aug 17, 2017
    #756
  17. Aug 17, 2017 at 9:33 AM
    #757
    GT7

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    Intercooler surface was great, one o-ring had some wear on it but still pretty minimal. Time will tell if the problem persists.

    I think maybe I spilled some coolant on it while taking it apart
     
    GT7, Aug 17, 2017
    #757
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  18. Aug 17, 2017 at 9:59 AM
    #758
    loginfailed

    #758
    loginfailed Well-Known Member

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    My truck takes a bit longer to start in general with the UCON, but after UCON software is updated it usually takes longer than normal until the UCON "learns".
     
    loginfailed, Aug 17, 2017
    #758
  19. Aug 17, 2017 at 10:33 AM
    #759
    GT7

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    Good news
     
    GT7, Aug 17, 2017
    #759
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  20. Aug 17, 2017 at 10:42 AM
    #760
    Nachotaco

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    Nachotaco Well-Known Member

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    Any idea when the ucons for the 2012 v6 tacomas will be ready to ship again?
     
    Nachotaco, Aug 17, 2017
    #760
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Page 38 of 86

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