Misfiring under hard load

Discussion in 'Mazdaspeed 3 Troubleshooting' started by Lorne, Apr 26, 2024.

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  1. Lorne

    Lorne Greenie N00B Member

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    About 2 weeks ago I bought a 2008 Mazda speed 3 with 184xxxkms. Test drove it and all went well. On the drive home the bov came out of the hose, tightened back up and it has been misfiring in hard boost ever sense.
    The car has mishimotto front mount
    Cts4 turbo
    Hpfp internals
    Exhaust
    3.5 intake
    Turbo smart gen 5 external waste gate.
    So far I've done plugs, hpfp spill valve, the sensor on the passenger side of the fuel rail. Coil packs, maf. Gone and tightened every hose clamp.
    Reflahsed my tune and resest my ECU.

    I had a fuel pressure regulator code but fixed it doing the sensor on the left on the fuel rail.
    Car seems to misfire less when it's cold. The fuel pressure is good, my afr is good. It starts to misfire when I stab it in any gear but does it less when I ease into it.
    I am new to these cars, do they have a ballast resistor? If so where are they located? Does anyone have thoughts on what else it could be? Also I have logs of it misfiring if anyone can read those.
     
    Lorne, via a mobile device, Apr 26, 2024
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  2. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    What spark plugs and what gap
     
    Easter Bunny, via a mobile device, Apr 26, 2024
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  3. Mtnbker3531

    Mtnbker3531 Platinum Member

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    What coil packs did you put on the car?
     
    Mtnbker3531, via a mobile device, Apr 26, 2024
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  4. Lorne

    Lorne Greenie N00B Member

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    Ngk iridium, they were gapped at 0.028

    I just took my friends coil packs off of his car.
     
    Last edited by a moderator: Apr 26, 2024
    Lorne, via a mobile device, Apr 26, 2024
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  5. Mtnbker3531

    Mtnbker3531 Platinum Member

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    So are they OEM or we have no idea?
     
    Mtnbker3531, via a mobile device, Apr 26, 2024
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  6. Lorne

    Lorne Greenie N00B Member

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    Oem
     
    Lorne, via a mobile device, Apr 26, 2024
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  7. Mtnbker3531

    Mtnbker3531 Platinum Member

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    Which NGK specifically? 3787? 6510?

    Also what is your tuning solution are you able to post a data log of the behavior?
     
    Mtnbker3531, via a mobile device, Apr 26, 2024
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  8. Lorne

    Lorne Greenie N00B Member

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    Thanks for the reply, I'm not 100 percent sure what plugs, I'll check tomorrow. I can send the logs here

    4.659,29.25,-11.55,93,0.27,1767,64,0,0.00,0.62,1.77,17.27,3696,-0.16,55.00,2,42,0,0
    4.739,29.25,-11.55,93,0.23,1767,64,0,0.00,0.62,1.73,15.16,3578,-0.16,55.00,2,42,0,0
    4.821,29.25,-11.55,95,0.20,1767,64,0,0.00,0.62,1.68,13.35,3472,-0.16,55.00,2,42,0,0
    4.901,29.25,-11.48,97,0.19,1767,64,0,0.00,-7.96,1.63,12.22,3351,-0.16,55.00,2,42,0,0
    4.975,29.25,-11.48,97,0.17,1767,64,0,0.00,-7.96,1.60,10.86,3237,-0.16,55.00,2,42,0,0
    5.067,29.25,-11.48,97,0.17,1767,64,0,0.00,-7.96,1.55,10.86,3237,-0.16,55.00,2,42,0,0
    5.147,29.25,-11.48,97,0.15,1767,64,0,0.00,-7.96,1.53,9.47,3133,-0.16,55.00,2,41,0,0
    5.224,29.25,-11.48,99,0.15,1752,64,0,0.00,-7.96,1.51,9.07,3017,-0.16,55.00,3,41,0,0
    5.310,29.25,-11.33,100,0.14,1682,64,0,0.00,-7.96,1.54,8.94,2948,-0.16,55.00,4,41,0,0
    5.392,29.25,-10.90,100,0.15,1617,64,0,0.00,-7.96,1.50,8.81,2743,-0.16,55.00,5,41,0,0
    5.468,25.87,-10.90,100,0.15,1617,64,0,0.00,-7.96,1.38,8.81,2743,-0.16,55.00,5,41,0,0
    5.544,18.38,-10.97,100,0.14,1561,64,0,0.00,-7.96,1.33,6.34,2517,-0.16,55.00,4,41,0,0
    5.630,15.58,-10.97,102,0.12,1514,64,0,0.00,-7.96,1.32,5.70,2439,-0.16,55.00,4,41,0,0
    5.712,14.11,-10.76,102,0.11,1471,64,0,0.00,-7.96,1.39,6.42,2565,-0.16,55.00,5,41,0,0
    5.791,13.38,-10.33,102,0.14,1420,64,0,0.00,-7.96,1.55,9.07,2539,-2.50,55.00,7,41,0,0
    5.877,12.94,-9.54,102,0.14,1420,64,0,0.00,-7.96,1.74,9.07,2539,-2.50,55.00,7,41,0,0
    5.954,12.94,-7.74,104,0.24,1372,64,0,0.00,-7.96,1.93,16.97,2540,-5.62,53.50,11,41,0,0
    6.022,13.96,-7.10,104,0.36,1288,66,0,0.00,0.62,1.92,20.05,2528,-14.20,53.50,11,40,0,0
    6.121,14.70,-6.88,104,0.38,1197,66,0,0.00,0.62,1.91,19.88,2522,-9.52,54.50,11,40,0,0
    6.206,14.55,-7.10,104,0.38,1211,66,0,0.00,0.62,1.87,18.17,2525,-7.18,55.00,10,40,0,0
    6.306,14.11,-7.24,104,0.37,1176,66,0,0.00,0.62,1.87,18.17,2524,-6.40,57.50,10,41,0,0
    6.375,13.96,-7.17,104,0.37,1156,66,0,0.00,0.62,1.87,18.17,2525,-7.18,57.50,10,40,0,0
    6.455,13.82,-7.10,104,0.37,1156,66,0,0.00,0.62,1.88,18.17,2525,-7.18,57.50,10,40,0,0
     
    Lorne, via a mobile device, Apr 26, 2024
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  9. Lorne

    Lorne Greenie N00B Member

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    Also thought I would mention has codes PCM, P0403, U0155, U0100, U2064
     
    Lorne, via a mobile device, Apr 27, 2024
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  10. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    Post the log as an attachment
     
    Easter Bunny, via a mobile device, Apr 27, 2024
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  11. Lorne

    Lorne Greenie N00B Member

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    4.659,29.25,-11.55,93,0.27,1767,64,0,0.00,0.62,1.77,17.27,3696,-0.16,55.00,2,42,0,0
    4.739,29.25,-11.55,93,0.23,1767,64,0,0.00,0.62,1.73,15.16,3578,-0.16,55.00,2,42,0,0
    4.821,29.25,-11.55,95,0.20,1767,64,0,0.00,0.62,1.68,13.35,3472,-0.16,55.00,2,42,0,0
    4.901,29.25,-11.48,97,0.19,1767,64,0,0.00,-7.96,1.63,12.22,3351,-0.16,55.00,2,42,0,0
    4.975,29.25,-11.48,97,0.17,1767,64,0,0.00,-7.96,1.60,10.86,3237,-0.16,55.00,2,42,0,0
    5.067,29.25,-11.48,97,0.17,1767,64,0,0.00,-7.96,1.55,10.86,3237,-0.16,55.00,2,42,0,0
    5.147,29.25,-11.48,97,0.15,1767,64,0,0.00,-7.96,1.53,9.47,3133,-0.16,55.00,2,41,0,0
    5.224,29.25,-11.48,99,0.15,1752,64,0,0.00,-7.96,1.51,9.07,3017,-0.16,55.00,3,41,0,0
    5.310,29.25,-11.33,100,0.14,1682,64,0,0.00,-7.96,1.54,8.94,2948,-0.16,55.00,4,41,0,0
    5.392,29.25,-10.90,100,0.15,1617,64,0,0.00,-7.96,1.50,8.81,2743,-0.16,55.00,5,41,0,0
    5.468,25.87,-10.90,100,0.15,1617,64,0,0.00,-7.96,1.38,8.81,2743,-0.16,55.00,5,41,0,0
    5.544,18.38,-10.97,100,0.14,1561,64,0,0.00,-7.96,1.33,6.34,2517,-0.16,55.00,4,41,0,0
    5.630,15.58,-10.97,102,0.12,1514,64,0,0.00,-7.96,1.32,5.70,2439,-0.16,55.00,4,41,0,0
    5.712,14.11,-10.76,102,0.11,1471,64,0,0.00,-7.96,1.39,6.42,2565,-0.16,55.00,5,41,0,0
    5.791,13.38,-10.33,102,0.14,1420,64,0,0.00,-7.96,1.55,9.07,2539,-2.50,55.00,7,41,0,0
    5.877,12.94,-9.54,102,0.14,1420,64,0,0.00,-7.96,1.74,9.07,2539,-2.50,55.00,7,41,0,0
    5.954,12.94,-7.74,104,0.24,1372,64,0,0.00,-7.96,1.93,16.97,2540,-5.62,53.50,11,41,0,0
    6.022,13.96,-7.10,104,0.36,1288,66,0,0.00,0.62,1.92,20.05,2528,-14.20,53.50,11,40,0,0
    6.121,14.70,-6.88,104,0.38,1197,66,0,0.00,0.62,1.91,19.88,2522,-9.52,54.50,11,40,0,0
    6.206,14.55,-7.10,104,0.38,1211,66,0,0.00,0.62,1.87,18.17,2525,-7.18,55.00,10,40,0,0
    6.306,14.11,-7.24,104,0.37,1176,66,0,0.00,0.62,1.87,18.17,2524,-6.40,57.50,10,41,0,0
    6.375,13.96,-7.17,104,0.37,1156,66,0,0.00,0.62,1.87,18.17,2525,-7.18,57.50,10,40,0,0
    6.455,13.82,-7.10,104,0.37,1156,66,0,0.00,0.62,1.88,18.17,2525,-7.18,57.50,10,40,0,0
     
    Lorne, via a mobile device, Apr 27, 2024
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  12. Lorne

    Lorne Greenie N00B Member

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    I believe I need to go on to my computer to do that, I can tomorrow evening.
     
    Lorne, via a mobile device, Apr 27, 2024
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