Mk3 Install No Start. Help!

Discussion in 'F/I Mods & Tuning' started by disciple X, Jan 18, 2017.

  1. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    It has been over 6 years since I posted here! I have been out of the scene for a while.

    I just installed the URD MK3 Stage 2 system on my truck and tried to fire it up. No good. I don't hear the fuel pump running at all, and it sounds like its not getting any gas. Anybdy else have this happen or have any ideas?
     
  2. XMPLRY808

    XMPLRY808 Active Member

    Joined:
    Dec 5, 2014
    Messages:
    321
    Likes Received:
    25
    Did you do the urd fuel pump upgrade? Recheck all connections
     
  3. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    Didn't mess with the fuel pump. I've had the upgraded pump installed for several years.
     
  4. Coupe

    Coupe Active Member

    Joined:
    Dec 31, 2007
    Messages:
    6,852
    Likes Received:
    10
    I have not installed one of these, but usually in the instructions they have you disable the relay that activates the fuel pump. If this was not reinstalled, you would have this issue.
     
  5. Gadget

    Gadget Well-Known Member

    Joined:
    Jan 13, 2007
    Messages:
    10,720
    Likes Received:
    52
  6. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    Update 1-22-17

    Talked to Gadget about the issue, and he hooked me up with Scott from Itronix who has been a big help.

    The no start was my fault, and I have nothing but ignorance to blame. I previouzly has a MK1 kit installed and had intermittent problems that I never found the source of. To try and eliminate the possibility that it was my ECU, I bought one from another 06 X-Runner and installed it at the same time as the MK3 system.

    Scott informed me that each ECU is coded to 1 specific vehicle. You can't simply swap them. I had no idea.

    After switching back to the original ECU, the truck fired up for the first time in a week, but was running rough. I had cylinder 4 misfiring, so I took the brand new plug out, and it was black from all the attempted starts and wrong computer, so I cleaned it with brake cleaner and reinstalled. It cranked back up and ran smoother, but still not perfect.

    I discovered a vaccum leak at one of the t fittigs that smoothed it out even more.

    The truck is running, but still seems to be misfiring some. I'm going to clean and reinstall the other 5 plugs and see how she runs then.

    Thanks to Gadget and Scott for the technical support. Hopefully I can get it completely smoothed out.

    I've done a couple WOT data logs, and it pulls pretty hard! If we can get it all smoothed out, I'll be really happy with the power level.
     
    #6 disciple X, Jan 22, 2017
    Last edited: Jan 26, 2017
  7. justin13703

    justin13703 Active Member

    Joined:
    Sep 9, 2010
    Messages:
    2,744
    Likes Received:
    8
    Glad they got you straightened out.

    It's too bad that you didn't post on here that you swapped your Ecu, we could have told you that was your problem. There are a lot of people on here that buy them used just to find out that they can't use them. But I guess if you don't know that you wouldn't even think to mention it. But the best thing to do is call URD anyway. Those guys are awesome.
     
    Torspd likes this.
  8. NHXRUNNER

    NHXRUNNER "New Hampster"
    Staff Member

    Joined:
    Jul 30, 2007
    Messages:
    7,179
    Likes Received:
    55
    Are you running it at WOT at the recommendation of URD for logging? I wouldn't be ripping around in it if you're still seeing misfires....
     
    #8 NHXRUNNER, Jan 22, 2017
    Last edited: Jan 23, 2017
    TitanRattler813 likes this.
  9. fishsticks

    fishsticks Because fast lifted truck.

    Joined:
    Nov 29, 2015
    Messages:
    207
    Likes Received:
    6
    +1. How old are your coil packs? You could have weak spark. Is your MAF or TB dirty?
     
  10. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    I wish I would have known. It would have saved me a ton of stress and heartache. Yeah, it didn't even register that it would be an issue. URD is helping to get me straightened out.
     
  11. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    The last data log I had only showed cylinder 4 misfiring. Once I cleaned the plug, it quit showing, so then Scott asked for data files.
     
  12. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    Coil packs are original from 06. Do they normally get weak over time?

    I'll check both Saturday and make sure they are cleaned out well while I'm changing plugs.
     
  13. fishsticks

    fishsticks Because fast lifted truck.

    Joined:
    Nov 29, 2015
    Messages:
    207
    Likes Received:
    6
    They certainly can. Might not be as noticeable on a stock motor but add some cylinder pressure and...

    I replaced mine as preventative maintenance when I put on my MK3.
     
  14. blackx-runner

    blackx-runner "White Flash"

    Joined:
    Jan 14, 2007
    Messages:
    7,565
    Likes Received:
    8
    I'd definitely get your misfires straightened out and your truck running top notch before ripping on it at all. MK3 is capable of a ton of power, likewise it's easily capable of killing a stock motor pretty damn quick if something isn't just quite right. I'd hate to see you posting that your engine is toast without ever being able to enjoy your new power.
    Was the kit you bought new or used? Are you running a fuel pressure gauge. If not I would highly recommend you get one. You starve it for fuel in WOT and it's probably game over for your engine.
    At the age of your truck I would look at just replacing all the vacuum lines, coil packs, fuel filter, clean MAF sensor, general maintenance type things. might even want to do a compression check and make sure something isn't funky there already.
     
  15. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    You just go back with stock? And where did you get them?
     
  16. disciple X

    disciple X Active Member

    Joined:
    Oct 9, 2008
    Messages:
    1,260
    Likes Received:
    0
    Kit was brand new. I'll be changing the spark plugs tomorrow and will also check the trottle body and MAF sensor.

    I changed the funky shaped vaccum line that runs along the plenum and replaced it with 3/8 ID fuel line and secured every fitting with hose clamps. Checked all the connections with soapy water to see if it sucked in any bubbles, and all were good. Will double check again tomorrow

    I'm also going to take some data logs and send to URD once plugs are changed. with the Ucon in place, I would imagine they can see any problems.

    I dont have a fuel pressure gauge. if thats an important one, I'll try to order one next week.
     
  17. fishsticks

    fishsticks Because fast lifted truck.

    Joined:
    Nov 29, 2015
    Messages:
    207
    Likes Received:
    6
    Yep, stock ones do just fine. Denso 673-1308 on Amazon - around $60 each.

    I have my old set (which still worked) for sale in another thread if you want some cheap spares to swap in. My truck got totaled so I don't need them anymore. $60+shipping for all. PM me if you want them.
     

Share This Page

  • About Us

    XR-Underground is a dedicated community of Toyota X-Runner enthusiasts that was launched in January 2007. X-Runner Underground.com, referred to as XRU by our regular members, offers an active discussion forum, group events, specialty merchandise, a welcoming community of owners and the most information you can find about the Toyota X-Runner on the internet!
  • Quick Navigation

    Open the Quick Navigation

  • Like us on Facebook

  • Your donations keep XRU going

    XRU is a forum for the users, by the users. We receive very limited funding from vendors so we really rely on donations to cover our operating costs and to provide products and giveaways at events. Every dollar helps!

    If you are able to donate, we'd really appreciate your help.