I have a 1993 Pontiac Bonneville that has low power when accelerating

Hi. I have a 1993 pontiac bonneville 3.8 non supercharged and it has a rough idle and it has a significant loss of power when accellerating an it has stalled a couple of times. The check engine
light is on and I have replaced the air intake temperature sensor and I cleaned the maf sensor with maf sensor cleaner and it seemed to work better for a couple days an then the check engine light came back on and it wouldn't accelerate right even when pressing down the pedal all the way and especially between 20-40 mph. I tried to read the code manually and idk if I'm reading it right I got the code p0112 or maybe its p0122 and the 112 code is the iat which I replaced and I drove my car down the street and the check engine light will come on and off. Where are the maf sensor relays and I originally thought the problem was a knock sensor or an ignition coil pack that went bad and it was misfiring. I have a knock sensor and coil pack handy if that's what needs replacing. Please help me with this problem.