Seems like a silly question but I'm running a ZFR turbo and MS109 race gas in an LHU Ecotec and above 15 psi boost, it seems to misfire. I have new stock plugs in it, gapped to .030 and I added "Total Misfires" PID in Scanner and no misfires show up in the logs. AFR are high 9's, low 10's at the richest, plugs look dark brown. Any ideas on what is causing this?