I was doing a WOT scan run and the fuel pump voltage dropped off and the system went lean. The scanner picked up nearly 12 KR for a second before I stopped. The car has a 3.5" pulley, colder plugs, P&P M90, u-bend delete, FWI, 180 thermostat and an overkill PCM. I was running it on 91/100 octane mixed half and half. It still sounds good, should I be worried about serious damage?