95 318i check engine light code 1222

[sektornj]

Hi all- i have a 95 318i. Was having hesitation problems and check engine light was coming on. Was receiving a 1221, so I replaced plugs/wires/coil/02 sensor (was due for em' anyway). Now im getting a 1222 code, car still running sluggish and check engine light still coming on every once in a while. The book says look for intake/air leaks- which i did- & found nothing. Idle is good, but when youre driving and step on the gas, she becomes sluggish and fuel economy is horrible.

Anyone ever run into this before?
Thanks for the help in advance!