88 Camero Code 33

Started With Code 34
I Have Had Nothing But Problems.....
Changed Mass Air Flow
Changed Egr Valve
Now Code 33 Comes Up And The Car Smells Like Its Running Rich
The Car Has Low Miles Under 60k Pefect Condition
Ran Better With Bad Wass Air Flow...
Am I Missing Somthing Please Help!!!!!!

try private messaging genopside, he has the book to interperate the codes, i dont know those codes off the top of my head, and cant give any advice till i know what they mean.

code 33 is MAF sensor ; poor electrical connection, open or short circut, defective MAF sencor, defective ECM