Woah damn…
These motors don’t just “throw rods” man. I’m not going to sit here and speculate, but don’t make any rash decisions until you KNOW what the problem is.
Mines is a Japanese tuner, BTW. They’re big into GTRs. However, unless you know EXACTLY what tune is on it you’re much better off sticking with AshSpec. Who knows what program / mods it was written for.
And like 90% of Z guys preach, stay away from JSpec motors. There is no reason to buy a JSpec motor unless you plan to rebuild it anyway.
Wat?