I've changed the fuel pump,all four O2 sensors, exhaust manifold gaskets,leak detection valve,all plugs,#5 coil pack,all 8 fuel injectors,TPS sensor,MAP sensor,air temp sensor,thermostat, coolant temp sensor,PVC valve,EGR valve, canister purge valve, cam sensor, crank position sensor, and the intake manifold with gaskets.... I STILL HAVE THE P0172 AND P0175 CODES........ HELP PLEASE!!!!!!

I've done a fuel pressure test and all is good there...
I've done a smoke test, I have a small leak at the top of the EGR VALVE... but its new.. guess it could be bad from the start... its not leaking in between the gasket and EGR. Its leaking at the stem of the plunger at the electrical motor side..