I disconnected the Egr connecter at the valve based on the paperwork that came with The Overkill pcm. I followed the instruction and cleaned the intake, I also found this info concerning the Egr and kr.
1. Loss of Exhaust Gas Recirculation (EGR): EGR keeps combustion temperatures down, reducing the tendency to detonate. If the EGR valve is inoperative or someone has disconnected or plugged its vacuum hose, higher combustion temperatures can cause pinging.
2. Check for loss of EGR. The Exhaust Gas Recirculation (EGR) system is one of the engine's primary emission controls. Its purpose is to reduce oxides of nitrogen (NOX) pollution in the exhaust. It does this by "leaking" (recirculating) small amounts of exhaust into the intake manifold through the EGR valve. Though the gases are hot, they actually have a cooling effect on combustion temperatures by diluting the air/fuel mixture slightly. Lowering the combustion temperature reduces the formation of NOX as well as the octane requirements of the engine.
If the EGR valve is not opening, either because the valve itself is defective or because its vacuum supply is blocked (loose, plugged or misrouted vacuum hose connections, or a defective vacuum control valve or solenoid), the cooling effect is lost. The result will be higher combustion temperatures under load and an increased chance of detonation.
Since I've tried most of the advice I received from various forums except sending the pcm back to Will and nothing has worked I'm going to plug the egr back in. I'll check for knock, if it's still there I'll gap the 104's to 45 check and then re-install the Iridium's. If the above doesn't bring the kr to below 3, which is what I was getting prior to to plog/crossover and a/l 104 install I'll just never do wot runs. since the the only time I get kr is stopped wot runs and rolling wot runs. During normal aggressive driving everything's fine
