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Well when I unplug it the engine runs horrible. How long did you leave it unplugged?

So the codes are indicating oxygen sensor saying system is rich. If I was getting low fuel pressure it would be lean correct? If the MAF sensor is bad and thinking there is more air then there is it would mix more fuel causing the engine to run rich. Right? I have already changed the fuel filter...

I havent tried changing or swapping out the o2 sensors. When the engine is cold it spits and sputters and has loss of power. Once its warm it runs fine but the check engine light comes on. Like I said I have changed the MAF sensor and a new fuel filter. I dont know how to check the fuel...

Yeah thats what I would think. But maybe the sensor at the junkyard was bad too.

I have a 1993 Explorer XLT. Did the self test with a paper clip and this is what I got. KOEO 111,157,177 KOER 116,137,538 Code 157 says MAF Sensor circuit open. I got a sensor from junk yard and still did the same thing. Would a bad sensor throw all these other codes? Thanks in advance

So I have a 1993 Ford Explorer XLT it idles rough and spits and sputters when its cold. Has a loss of power and the Check Engine Light comes on after about 5 minutes of running. Once its warm its not as jumpy but still has loss of power. I dont have a code reader. I have tried a new MAF sensor...