1994 e320 running sluggish

[lebstyle]

hi i gotr a 1994 e3320,
i recently changed the MAF, spark plugs, wires, air filter.
i had alot of codes i cleared them all up, the car ran smooth.
but ever since the car is running very heavy like it does'nt wanna go.

i read the codes and i got:
code 23 on the main reader.
code 8 on pin 8
code 2 on pin 14

any ideas?
thanks in advance.