So I had mine on a test stand, had it WOT for about 5 seconds and heard an odd sound, brought it back to an idle, tried to open er up again and it wouldnt go much past 4K RPMs and sounding like a V8 running on 4 cylinders. Then it died and would only fire but not run again. Pulled the plug(CM6) and noticed some metal filings on the plug. Plug looked good, ignition working, tried the original plug and same thing, only fire not run. Ideas? What should the head bolts be torqued to should I remove for inspection?