Fixed small coolant leak now can't hit load or boost targets

Discussion in 'Mazdaspeed 3 Troubleshooting' started by OverBoosted, Apr 15, 2017.

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  1. OverBoosted

    OverBoosted Greenie Member

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    The problem started when I found and fixed a small coolant leak on the turbo feed for my GTX3071. I had to remove TIP, battery, box etc to get to it. Once I got it all back together I am down to around spring pressure (19lbs) and not able to hit my load targets. The boost pressure is hit or miss now ranging from 17-20 psi max on a log.

    Here are the things I have checked to see if it was the issue.

    Boost leak test - no leaks
    checked all EBCS lines - no tears or holes
    Removed my ewg and tested it by pressurizing the bottom port - opens and closes correctly
    Looked for exhaust leaks around turbo, mani, and dp - nothing
    Checked turbo - no side to side or in out play
    swapped BPV to a known working one - no changes
    Uninstalled AP and reinstalled - no change
    New map direct from tuner - no change
    bypassed my ebcs (hooked pressure line straight to the bottom port on my wastegate - couldn't hit spring pressure (19psi spring)
    Checked guardian angel operation and even bypassed it - no changes

    I'm at a loss for why I can't even hit spring pressure. I'm thinking my wastegate is messed up but I can't wrap my head around the fact that its opening (screamer pipe) but only hitting around 17psi and way down on my load target.

    Has anyone had a similar issue? Any help at this point would be awesome.

    Oh my main mods are -
    GTx3071 - ATP EWG hotside with Tial MVS
    Fullrace mani
    HTP3.5 Intake
    Grimmspeed EBCS
    V1 Guardian Angel
    Devils own meth kit stg 1 (I have switched back to 93 only map for troubleshooting)
    Turbosmart 50/50 BPV
    Cobb FMIC




    EDIT: thought I had narrowed it down to blown turbo. Have replaced CHRA with new Garrett one. Still same issues as before.
     
    Last edited: Jun 27, 2017
  2. VoodooJef

    VoodooJef My friends call me Captain Zen Greenie Member

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    Just what I would think were it my car:

    "well, if it was a massive exhaust leak pre-turbo it`d do that, but I`d see/hear it or otherwise find evidence. It`s not even hitting spring pressure. Better take a look at the wastegate".
     
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  3. OverBoosted

    OverBoosted Greenie Member

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    I too think my wastegate is toast. I plan on pulling it out again and swapping springs and a new diaphragm into it. I will update the thread once I do so.

    Sent from my Pixel XL using Tapatalk
     
    OverBoosted, via a mobile device, Apr 17, 2017
    #3
  4. btstarcher

    btstarcher Greenie Member

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    Was it the wastegate? It's the only thing that makes sense.
     
  5. OverBoosted

    OverBoosted Greenie Member

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    Negative, I have narrowed it down and believe the turbo is shot. I have ordered a new CHRA and will be swapping that out soon.
    --- Double Post Merged, Jun 19, 2017 ---
    Oh also, to test I unhooked the Waste-gate pressure line and was cautiously getting into boost to see if it would spool. Well 19psi was the most pressure I could build with no waste-gate opening and WOT in 3rd gear. My thought was without a waste-gate it should have overboosted to infinity. Since it didn't It lead me to believe the turbo was toast.
     
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  6. djohns

    djohns Silver Member

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    Hmm. Interesting. What's done for on the turbo?
     
    djohns, via an iPhone, Jun 19, 2017
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  7. OverBoosted

    OverBoosted Greenie Member

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    I saw what appeared to be oil and coolant on the on the compressor blades when I fixed the leak. My thought is that somehow coolant got into the turbo and screwed the BB in the chra.

    Got a replacement chra for $700 and am planning on installing this weekend.

    Sent from my Pixel XL using Tapatalk
     
    OverBoosted, via a mobile device, Jun 20, 2017
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  8. ConeKiller

    ConeKiller Motorhead Greenie Member

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    I'd be interested in inspecting the chra to see what happened.
     
    ConeKiller, via a Nexus device, Jun 21, 2017
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  9. OverBoosted

    OverBoosted Greenie Member

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    Well Fuck my life, replaced CHRA with new one and still have the same problem.
     
  10. btstarcher

    btstarcher Greenie Member

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    Wastegate.

    Sent from my SM-G955U using Tapatalk
     
    btstarcher, via a mobile device, Jun 26, 2017
    #10
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  11. OverBoosted

    OverBoosted Greenie Member

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    I thought that but I have already replaced the diagram and springs inside the wastegate. I even unplugged it altogether and the turbo would still not boost past 19psi

    Sent from my Pixel XL using Tapatalk
     
    OverBoosted, via a mobile device, Jun 26, 2017
    #11
  12. btstarcher

    btstarcher Greenie Member

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    When you unplug it, it's closed? Or open? Something doesn't sound right. What do your fuel trims look like? Are you positive the BPV is good?

    Sent from my SM-G955U using Tapatalk
     
    btstarcher, via a mobile device, Jun 26, 2017
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  13. OverBoosted

    OverBoosted Greenie Member

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    Yes, when it was unplugged the WG is closed and will not open. Its an EWG so its very easy to hear when its open. As for the BPV I have swapped another known working one on and it didnt change anything.
    --- Double Post Merged, Jun 26, 2017 ---
    Oh, LTFT's are all within +/- 4
     
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  14. ConeKiller

    ConeKiller Motorhead Greenie Member

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    post a log?

    I think more information would help here.

    Sounds like you've exhausted hardware issues, so tune is the next place to look.
     
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  15. OverBoosted

    OverBoosted Greenie Member

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    Here are a few logs I did right after the CHRA swap. 3rd gear and 4th gear.
     

    Attached Files:

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  16. ConeKiller

    ConeKiller Motorhead Greenie Member

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    Is your tune locked? if not, can you post it?

    Your car is only requesting ~20% wgdc, it's not even asking for a substantial amount of boost.
    This looks tune related.

    Also, which wastegate actuator do you have?
    EDIT: doh. nvm, tial external.
     
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  17. OverBoosted

    OverBoosted Greenie Member

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    This tune has been on my car for over a year hitting 21psi and 2.1 load. This is just my 93 map with meth turned off. It was tuned in the same kind of weather we have now also.

    I have tried updated tunes, reflashed, swapped to my meth map. Nothing changes when changing the tune.
     
  18. ConeKiller

    ConeKiller Motorhead Greenie Member

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    Independent of anything else, the tune should be requesting more wgdc if you aren't hitting target boost/load- so there is something there that isn't hardware related. Do you have old tunes to roll back to?
     
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  19. OverBoosted

    OverBoosted Greenie Member

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    Yes, I have old tunes I have tried as well as newer ones that command more WGDC. Even with WGDC in the 60's im only hitting 18psi at 5000 rpm.
     
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  20. ConeKiller

    ConeKiller Motorhead Greenie Member

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    hmmmmm....

    Plugs? Shitty combustion can lead to poor power delivery/boost.

    I just fouled out a set of plugs on my 6, but that was due to an catastrophic/ZOMG rich incident with fireballs, etc.
     
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