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UCON Flex Advanced Engine Management System

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

Page 39 of 86
  1. Aug 17, 2017 at 11:50 AM
    #761
    GT7

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    GT7 One piece at a time

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    Probably 40 miles now and only code is P219A.

    I also realigned and tightened my air intake
     
    GT7, Aug 17, 2017
    #761
  2. Aug 17, 2017 at 2:23 PM
    #762
    Voodoo Rufus

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    Voodoo Rufus Well-Known Member

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    I think another reason for the longer start, along with the UCON sync'ing, is because the fuel pump does not engage until the UCON tells it to. I'm working on a way to hard wire the fuel pump to the ignition so I can pressure up the system before I crank the engine.
     
    Voodoo Rufus, Aug 17, 2017
    #762
    Roostfactor likes this.
  3. Aug 17, 2017 at 2:32 PM
    #763
    gersus

    #763
    gersus Well-Known Member

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    Lil lift, bumpers, SC, UCON, headers, etc.
    I didn't notice the change. I think all toyotas start slow.
     
    gersus, Aug 17, 2017
    #763
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  4. Aug 17, 2017 at 6:04 PM
    #764
    loginfailed

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    loginfailed Well-Known Member

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    Ive read it posted in threads before here and there about the UCON taking longer to start. My truck did it a few times and I asked Scott about it just in case and he said it's normal behavior and gets better over time.
     
    loginfailed, Aug 17, 2017
    #764
    jojotoo likes this.
  5. Aug 17, 2017 at 8:07 PM
    #765
    VolcomTacoma

    #765
    VolcomTacoma Well-Known Member

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    I've actually considered a couple times installing a kill switch in the dash from the fuel pump. So if someone does get in the truck and try to start, it'll turn over and die
     
    VolcomTacoma, Aug 17, 2017
    #765
    loginfailed[QUOTED] likes this.
  6. Aug 17, 2017 at 8:20 PM
    #766
    loginfailed

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    loginfailed Well-Known Member

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    So easy. You can even make it a multi-input to bypass it. Passenger seat belt buckled, parking brake applied, foot brake applied and radio on. left right left right up down up down b a select start.
     
    loginfailed, Aug 17, 2017
    #766
    BassAckwards, Torspd, gersus and 3 others like this.
  7. Aug 18, 2017 at 5:38 AM
    #767
    VolcomTacoma

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    VolcomTacoma Well-Known Member

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    Way to complicated. Just thinking a little button switch under the dash, maybe in the parking brake cubby. Or somewhere more hidden. Just something I can easily press non chalantly but not something just anyone will think to look for
     
    VolcomTacoma, Aug 18, 2017
    #767
    SonnyBones likes this.
  8. Aug 18, 2017 at 5:42 AM
    #768
    Skootter14

    #768
    Skootter14 Upon my signal, unleash Hell

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    GOD MODE cheat! haha
     
    Skootter14, Aug 18, 2017
    #768
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  9. Aug 18, 2017 at 9:00 AM
    #769
    nfs257

    #769
    nfs257 Well-Known Member

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    My switch pros has a couple empty spots that I could use for that and with no label no one would realize the need to push it.
     
    nfs257, Aug 18, 2017
    #769
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  10. Aug 18, 2017 at 12:15 PM
    #770
    Voodoo Rufus

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    Voodoo Rufus Well-Known Member

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    When the truck is warm and the fuel system still has pressure, it fires real quick. The longest is cold start with zero fuel pressure. About 2-3x as long as before UCON.
     
    Voodoo Rufus, Aug 18, 2017
    #770
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  11. Aug 18, 2017 at 12:22 PM
    #771
    GT7

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    GT7 One piece at a time

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    Exact same for me.
     
    GT7, Aug 18, 2017
    #771
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  12. Aug 18, 2017 at 12:38 PM
    #772
    Skootter14

    #772
    Skootter14 Upon my signal, unleash Hell

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    I wonder what the result will be with a Viper remote starter. It already delays 2-3 seconds with that...guess we'll find out
     
    Skootter14, Aug 18, 2017
    #772
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  13. Aug 18, 2017 at 1:10 PM
    #773
    jojotoo

    #773
    jojotoo Well-Known Member

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    No starting issues for me .. even with viper remote start.

    Edit : " knock on wood "
     
    jojotoo, Aug 18, 2017
    #773
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  14. Aug 18, 2017 at 2:39 PM
    #774
    loginfailed

    #774
    loginfailed Well-Known Member

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    Mine never take that long. If it takes longer to start after a cold soak that could actually be a fueling issue. Pump not holding pressure over time... Injector slightly open...

    I have a Prestige remote start and it works like a charm.
     
    Last edited: Aug 18, 2017
    loginfailed, Aug 18, 2017
    #774
    Skootter14[QUOTED] likes this.
  15. Aug 18, 2017 at 3:51 PM
    #775
    Torspd

    #775
    Torspd Tor-nication

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    A check valve inline will always help.
     
    Torspd, Aug 18, 2017
    #775
  16. Aug 18, 2017 at 8:43 PM
    #776
    jojotoo

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    jojotoo Well-Known Member

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    Damn .. 2.55 pulley is tiny lol
     
    jojotoo, Aug 18, 2017
    #776
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  17. Aug 18, 2017 at 9:12 PM
    #777
    loginfailed

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    loginfailed Well-Known Member

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    Installing mine tomorrow, time permitting:fingerscrossed:

    You get yours on yet?
     
    loginfailed, Aug 18, 2017
    #777
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  18. Aug 18, 2017 at 9:26 PM
    #778
    jojotoo

    #778
    jojotoo Well-Known Member

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    Not till next weekend .. waiting for spark plugs and new belt. But I got all my parts in from urd.

    Y pipe / 7th / pulley . Good luck on your install tomorrow !
     
    jojotoo, Aug 18, 2017
    #778
    loginfailed[QUOTED] and oni06 like this.
  19. Aug 18, 2017 at 9:41 PM
    #779
    loginfailed

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    loginfailed Well-Known Member

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    Thanks. Hopefully everything goes smoothly!

    Scott said he may be out of town this weekend so he went ahead and loaded the stage 3 tune ahead of time. The truck runs WAY better on S3 than it did on S1. Even though the cats are still there, 7th isn't wired up and still on 2.85 pulley.
     
    loginfailed, Aug 18, 2017
    #779
    Skootter14, nfs257, jojotoo[QUOTED] and 1 other person like this.
  20. Aug 18, 2017 at 11:54 PM
    #780
    jojotoo

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    jojotoo Well-Known Member

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    Finally .. I've been waiting for the cel to pop back up so Scott can take a look. It's been 5 day, P0420.
     
    jojotoo, Aug 18, 2017
    #780
Page 39 of 86

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