Misfiring under hard load

L

Lorne

Greenie N00B Member
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 said:
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
Click to expand...
Easter Bunny said:
Post the log as an attachment
Click to expand...
I believe I need to go on to my computer to do that, I can tomorrow evening.
 
Check for boost leak mine did the same thing turned out my manifold cracked
Would misfire bad under boost load anything positive made it misfire here’s a photo of mine so you can look. I pulled my whole car apart chasing it it’s a 1000$ fix so be prepared lol
 

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