Just got finished changing plugs (.48 gap), wires (Livewires from SCP), O2s, fixed exhaust leak, deleted EGR, replaced SC with 25k SC, now it pings a little when over 10 PSI. I am running a 5% pulley like before. It has 192k on it, but is in good shape overall. What could be causing the pinging? I always use 92 octane or better when available. Also, with EGR deleted, get CEL once in cruising range. When I first start out, no CEL, but give it a couple of minutes, and it comes on. Any ideas what's happening there? Thanks,
Don
Don