Going back to stock

Discussion in 'Stock Performance/Mechanical' started by na-mr2, May 12, 2017.

  1. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    Hello all this is my first post here. I just purchased an 06 X Runner with 52k. It has some mods and the check engine light is on. I took the gamble and. Bought it. Mods are as follows
    Doug Thorley long tube headers
    Magnaflow ss catback
    URD cold air
    NST light weight pullies
    URD map Ecu
    URD O2 stimulators
    URD short throw
    Oil pressure and oil temp gauges
    And a few other things.

    Previous owner told me about the light coming on. I drove it home with the light on and ran fine. I cleared the codes and started it only to have the light flashing and it was sluggish. Turned off and started it again and it ran fine but the light is constant on. I don't care about the mods. I have no issues going back to stock. I have all the parts except the air box. The codes are p0300, p0303, p0305, p0174. Any thoughts?
     
  2. o0opackersfano0o

    o0opackersfano0o Active Member

    Joined:
    Jun 23, 2016
    Messages:
    389
    Likes Received:
    81
    Kinda weird codes. 300 is random misfire. 303 is misfire on cylinder 3 and 305 is misfire on cylinder 5. 1,3,5 are on bank 1. Your 174 is lean on bank 2.
     
  3. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    So I spoke to the previous owner. He never had an issue with a code prior to the headers, intake or the maf calibrator. I didn't ask if he changed any plugs or coils. I'm not a mechanic by any means which is why I'm here. I'm ready to get it back to stick and start from there and sell all the performance parts
     
  4. SgtBadA

    SgtBadA Active Member

    Joined:
    Apr 21, 2013
    Messages:
    583
    Likes Received:
    33
    I say take off the maf calibrator and see what happens. I've been running long tube headers for 3 years now and haven't had an issue yet. I would venture a guess that either the maf sensor is bad or that calibrator is jacking up your signal readings to the computer
     
  5. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    Either would give a misfire code? I'm not a mechanic so sorry if it's a dumb question
     
  6. C10Ben

    C10Ben New Member

    Joined:
    May 8, 2017
    Messages:
    29
    Likes Received:
    3
    I just bought my 2008 x runner last week with 107k miles . I had random multiple misfire . Cylinder 2 misfire . Cylinder 4 misfire . Passenger side is reading lean . Drivers side is reading rich .... runs fine off idle . A little shaky at idle but nothing to bad ...... the other day. I lost all power and check engine started flashing ..... I ended up replacing the three injectors on bank 2 .... since then I haven't had a misfire code come back . But I'm still getting lean passenger bank . Rich drivers side . I have compression and Fire . I'm. Thinking the vvt is sticking and has my timing stuck advanced on the drivers bank and that's why it's rich. I'm going to replace the vvt solenoids . Will let you know if this changes anything
     
  7. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    I have had it idle low and alittle stuttering to. Yesterday I took it out and it was misfiring crazy. Sounded like and old ford. Keep me posted please. I'll be dropping it off at the shop in a week so I'll wait to hear what your results are
     
  8. o0opackersfano0o

    o0opackersfano0o Active Member

    Joined:
    Jun 23, 2016
    Messages:
    389
    Likes Received:
    81
    Ya best bet is to have it looked at. I could help u if u were local. Just gotta swap around plugs, coils, Injectors. And I don't think the maf cal has anything to do with it or else it would be lean on both banks not just one.
     
    C10Ben likes this.
  9. C10Ben

    C10Ben New Member

    Joined:
    May 8, 2017
    Messages:
    29
    Likes Received:
    3
    I'm a fully certified mechanic . The vvt. Is arriving Wednesday . If it does not fix the problem . I will be pulling the front cover to
    Inspect. The timing chain to make sure it's not a tooth off . Or the guides and tensioner are performing properly . I WILL find the problem . Lol . And will def keep the forum posted
     
  10. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    Considering mine only has 52k I doubt that would be an issue for me. Then again, I'm. It a mechanic. But I will be waiting for your diagnosis
     
  11. o0opackersfano0o

    o0opackersfano0o Active Member

    Joined:
    Jun 23, 2016
    Messages:
    389
    Likes Received:
    81
    Usually if the timing is off you can a cam crank correlation code. I've seen it happen on fj's. The chain actually stretches. Dunno why only on fj's
     
    C10Ben likes this.
  12. SgtBadA

    SgtBadA Active Member

    Joined:
    Apr 21, 2013
    Messages:
    583
    Likes Received:
    33
    Fj cruisers have dual VVT. I think that's how the chain stretches. As for the po300 code that's a random misfire not isolated to a single cylinder. That maf calibrator if it went bad it could make the engine run way to lean and cause the misfire. That's why I say remove it and see if that changes anything
     
  13. C10Ben

    C10Ben New Member

    Joined:
    May 8, 2017
    Messages:
    29
    Likes Received:
    3
    You are right . And I haven't gotten and. Crank/ cam correlations on this . But It did read cylinder 2-4-6 misfire . I wanna check the cam phaser at the very least . See if it's gummed up . Hoping the previous owner was as anal about his oil changes as I am
     
  14. Redlantern

    Redlantern Member

    Joined:
    Jan 28, 2013
    Messages:
    520
    Likes Received:
    5
    I would do this first than anything else.
     
  15. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    The previous owner did all the install himself and said the calibrator was difficult for him to install. From what you guys are saying I'll guess he mixed a wire or two. He said he didn't have the cel light on till after that and the intake and exhaust.
     
  16. Slywhitty

    Slywhitty "Midget Magnet"

    Joined:
    Jan 26, 2008
    Messages:
    3,385
    Likes Received:
    7
    Have you talked to @Gadget about these issues? I'm sure he could lead you in the right direction!
     
    Gadget likes this.
  17. autobodyX

    autobodyX Active Member

    Joined:
    Aug 8, 2010
    Messages:
    837
    Likes Received:
    27
    How about doing a plug check or change? Recomended service on them is 30,000 miles. Then I would swap the two aid fuel sensors and see if it codes the same or switches sides.
     
  18. na-mr2

    na-mr2 Member

    Joined:
    May 12, 2017
    Messages:
    65
    Likes Received:
    5
    I haven't reached out to gadget yet. I'm ode to this site so I'm learning where to get advice
     
  19. Slywhitty

    Slywhitty "Midget Magnet"

    Joined:
    Jan 26, 2008
    Messages:
    3,385
    Likes Received:
    7
    Well he is URD. So he's the man to ask about issues with urd stuff!! Good luck getting it all sorted out!
     
  20. wolfpack_5150

    wolfpack_5150 Jangley

    Joined:
    Jan 13, 2012
    Messages:
    303
    Likes Received:
    17
    And what happend?
     

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.