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UCON Flex Advanced Engine Management System

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

Page 9 of 86
  1. Jul 1, 2017 at 7:58 PM
    #161
    Roostfactor

    #161
    Roostfactor Well-Known Member

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    So s/c and UCON just installed. Trying to start....like 50 times now. Starts then immediately dies. Thoughts?
     
    Roostfactor, Jul 1, 2017
    #161
  2. Jul 1, 2017 at 8:01 PM
    #162
    Roostfactor

    #162
    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    Battery charger is plugged in and getting plenty of voltage.
     
    Roostfactor, Jul 1, 2017
    #162
  3. Jul 1, 2017 at 8:06 PM
    #163
    loginfailed

    #163
    loginfailed Well-Known Member

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    That almost sounds like an immobilizer issue. What's the security light on the instrument cluster doing?
     
    loginfailed, Jul 1, 2017
    #163
  4. Jul 1, 2017 at 8:10 PM
    #164
    Roostfactor

    #164
    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    Will blink until I put key in ignition. As soon as I do...not even turning the key, light goes out.
     
    Roostfactor, Jul 1, 2017
    #164
  5. Jul 1, 2017 at 8:19 PM
    #165
    loginfailed

    #165
    loginfailed Well-Known Member

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    That's what mine does.

    If you have anyone that can help, maybe try to spray some carburetor cleaner or something into the intake while starting it. See if you can keep it running off the brake clean.
     
    loginfailed, Jul 1, 2017
    #165
  6. Jul 1, 2017 at 8:24 PM
    #166
    gersus

    #166
    gersus Well-Known Member

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    Lil lift, bumpers, SC, UCON, headers, etc.
    Did you install fuel pump too? If you did keep crankin, it'll start.
     
    gersus, Jul 1, 2017
    #166
  7. Jul 1, 2017 at 8:27 PM
    #167
    Roostfactor

    #167
    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    It catches and starts every time....then immediately dies. Going to have to call it's quits soon, going on family vacation in the morning. Will be back next Sun.
     
    Roostfactor, Jul 1, 2017
    #167
  8. Jul 1, 2017 at 8:33 PM
    #168
    Roostfactor

    #168
    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    Fuel pump installed a month ago with no issues. It's my daily.
     
    Roostfactor, Jul 1, 2017
    #168
  9. Jul 1, 2017 at 9:09 PM
    #169
    loginfailed

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    loginfailed Well-Known Member

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    If it's not the immobilizer, it's probably something with the UCON.

    I'm not saying anything is wrong with the UCON, but maybe it's not seeing what it wants to see or it's not passing something through to the ECU that the ECU wants to see.
     
    loginfailed, Jul 1, 2017
    #169
  10. Jul 1, 2017 at 9:38 PM
    #170
    Roostfactor

    #170
    Roostfactor Well-Known Member

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    Agreed. Starts just fine but never catches to continue running after that initial rev at start up. Just dies immediately. I'm on stock tune, disconnected battery twice, disconnected maf sensor, same exact results. Sucks cause now I get to think about it for a week until I get back to it.
    Thanks for the help...suggestions welcome.
     
    Last edited: Jul 2, 2017
    Roostfactor, Jul 1, 2017
    #170
    loginfailed likes this.
  11. Jul 1, 2017 at 10:19 PM
    #171
    gersus

    #171
    gersus Well-Known Member

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    Lil lift, bumpers, SC, UCON, headers, etc.
    Sounds like it may not be getting fuel.
     
    gersus, Jul 1, 2017
    #171
  12. Jul 1, 2017 at 10:36 PM
    #172
    Roostfactor

    #172
    Roostfactor Well-Known Member

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    It does initially because it starts and runs for about 2 seconds every time I hit the starter.
     
    Roostfactor, Jul 1, 2017
    #172
  13. Jul 2, 2017 at 12:43 AM
    #173
    FinnJ

    #173
    FinnJ Well-Known Member

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    TRD SC, UCON, CNG conversion, RC 6" (lifted 4"/3" air suspension) w/FOX 2.5, 315/70R17 Duratracs, RECARO seats, etc.
     
    FinnJ, Jul 2, 2017
    #173
    Torspd[QUOTED] likes this.
  14. Jul 2, 2017 at 1:14 AM
    #174
    FinnJ

    #174
    FinnJ Well-Known Member

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    FinnJ, Jul 2, 2017
    #174
  15. Jul 2, 2017 at 1:51 AM
    #175
    loginfailed

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    loginfailed Well-Known Member

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    I had the exact same scenario back in November. Installed and flashed w/ Bully Dog. Truck ran dangerously lean in boost (like 18 AFR). I had to leave on vacation and I kept thinking about the truck while I was gone.

    :lalala:
     
    loginfailed, Jul 2, 2017
    #175
    Torspd and Roostfactor[QUOTED] like this.
  16. Jul 2, 2017 at 8:47 AM
    #176
    Roostfactor

    #176
    Roostfactor Well-Known Member

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    Roostfactor, Jul 2, 2017
    #176
  17. Jul 2, 2017 at 10:35 AM
    #177
    Torspd

    #177
    Torspd Tor-nication

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    Send the email to tech support. Before you leave that way if it takes a while to respond, you should still have it before you return.

    Or just call when you get back.

    Do you have a laptop to hook up to the UCON?
     
    Torspd, Jul 2, 2017
    #177
    gersus likes this.
  18. Jul 2, 2017 at 11:09 AM
    #178
    Roostfactor

    #178
    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    Yeah, I was planning on emailing urd in the next few days.
     
    Roostfactor, Jul 2, 2017
    #178
  19. Jul 2, 2017 at 11:10 AM
    #179
    Roostfactor

    #179
    Roostfactor Well-Known Member

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    Oni did you get yours hooked up yet?
     
    Roostfactor, Jul 2, 2017
    #179
  20. Jul 2, 2017 at 12:20 PM
    #180
    oni06

    #180
    oni06 Well-Known Member

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    Negative. Not gonna happen this weekend. There where some logistics problems at the shop and they didn't have space to keep the truck overnight.
     
    oni06, Jul 2, 2017
    #180
Page 9 of 86

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