Rod knock

[JustJoseph_]

Year/Make/Model: 2012 mazdaspeed 3 2.3l
Mileage:156000
Location:MN
Concern: rod knock on my third revision for my tune and 2nd wot pull the car shut off at 6000 rpm i was able to turn it right back on and limp it home just want some options on how to diagnose (bore scope should be here on friday and droping the oil pan are already on the list and i have taking my valve cover off, everything has a nice coat of oil no metal bits and nothing is lose) and what to do if it is a rod.
DTC's: None
Modifications Bnrs4, grimmspeed boost controller, corksport TMIC, JBR 3.5 Intake, Hks bov, 4.5 bar sensor, corksport HPFP, Ngk colder plugs gapped to 0.026"
ECU/Tuning Software: cobb accessport
Tuner: PD TUNING
Is the concern intermittent? No
Can you duplicate the concern? yes
Recent Repairs: replaced turbo



Thank you to anyone willing to help in advance

 

[phate]

Do you get any vibration or tapping in the clutch pedal if you press on it lightly?

You might be able to do a piston height check - compare 1 & 4's height to each other, the compare 2 & 3's height to each other.

 

[JustJoseph_]

Do you get any vibration or tapping in the clutch pedal if you press on it lightly?

You might be able to do a piston height check - compare 1 & 4's height to each other, the compare 2 & 3's height to each other.

I will do that when I get home from work thank you

 

[Cfoldone]

My speed 6 when I bought it, seller said just a short time rod knock. I heard it as I pulled it on to my trailer at sale. Fast forward to valve cover off and pan next.... Not a good sign on #1 rod. Big end was destroyed, bearing turned into glitter and debris, rod big end destroyed. Was a complete rebuild. Fortunately was built was forged rods and Manley pistons. So torn down to pieces to clean out all block & head oil passages. I really hope yours can just be a bearing shell.