Lean / Rich Codes

[NV93Cobra]

I'm consistently having the Check Engine Light come on after about 10 minutes of driving the car. When I put the car into to self test mode I get the following codes:

41/91 - Lean during the Continuous Memory Test

and

42/92 - Rich during the Engining Running Test (with the car at operating temperature)

I just don't understand how I'm getting lean codes out of Memory but am getting rich codes during the Run test. I replaced the O2 sensors about a year ago when I initially tried to fix this and this morning I replaced the MAF sensor with what I believe is the correct one (purchased from AutoZone).

Any assistance would be appreciated.

[1993cobra]

vacuum lines, idle air motor, O2 sensors, air filter, timing, catalytic converters fuel pressure regulator, map sensor, ??,

[93Cobra#2771]

Vacuum leak, exhaust leak, mods, etc? And what he said ^--------

Does it say which bank is giving the errors?