2000 S-10 Blazer runs rich

2000 blazer with 108000 miles on it all new tune up parts. It runs rich and has 2 codes running rich left bank and runs rich right bank. I need help

2000 blazer with 108000 miles on it all new tune up parts. It runs rich and has 2 codes running rich left bank and runs rich right bank. I need help

Can you post the actual codes? Exactly what did you replace in the tune up?

po172 and po175 I replaced cap rotor plugs plug wires. I also ran top engine cleaner through the engine . I used my snap on fuel system cleaner to clean the injectors. I removed the egr vave assembly and cleaned all carbon off. I also replaced o2 sensor

I think thats it
Thanks for your quick response. The customer just dropped vehicle off for me to figure out.