I have an 08 g37, recently refreshed a used engine, everything turned on fine and its running fine until it got up to temp and misfires. I eliminated all codes from high circuit oil temp, to idle relearn. I did all diagnostics to my knowledge, switched coil packs around and still stayed on same, spark plugs have less than 5k oem,
switched injector 1&3 still on cyl 1… i compression tested cylinders all were 180-190 cold engine cylinder one was highest being 195, i don’t know what else to diagnose, i am very inclined mechanical wise, though first time swapping and refreshing/rebuilding engine.

AGAIN
Cold starts are good no misfires, codes, or hiccups



Cyl six tested 180- battery was also giving out lol