CM870 tuning

[Magnat1976]

Thanks Rawze, for great response,ill be doing delete programming with Running rough today.
I am driving this truck for couple months, but not happy.
Drove with with everything plugged in ,it running with surging boost,but reaching up to 36 psi,and I dont feel 500 hp and poor on fuel
I tried as you mentioned, unplugged 2 connectors from egr valve and egr temperature sensor, that boost surging seems disappearing, but it derates the boost,up maybe to 25psi,and runs lazy..and engine light is on.but better on fuel.
Yesterday I tried the trick, I hooked the an extra egr valve to the harness to cheat,it drives,but I am getting delta p sensor -value too high error..is it clogging?
All sensors-delta p,back pressure,boost pressure and temperature sensors are new,egr valve,cooler factory red..its old truck but 660k miles
About Egt I put pro on exhaust manifold, not inside..and dont have hills