ok heres my problem

i tried putting on a bigger intake on my 1.6L 94 nissan sentra. i broke the MAF, and the check engine light came on. i ordered a new one form a junkyard, and it came today. i put it in and the check engine light was off. however the engine was sputtering a bit and there was the smell of gasoline so i figured the engine was flooded form getting incorrect readings when i ran the engine without a MAF. i turned the engine on again, and the light was back on! i thought this could possibly bethere being too much fuel in the engine, so i started to remove the intake plenum to suck out the fuel. i accidentally knocked off a hose from the plenum to the air intake, and i realized i could just take out the fuse for the fule pump. so i put the screws back in the plenum and ran the car til it ran out of fuel. i put everything back, and also noticed the hose and put it back, and ran the engine. i also disconnected and reconnected the battery to reset everything. still the light was on! this time the engine wasnt sputtering though. the only thing i can think of is the new MAF is also broken. can if break from too much air the new intake is getting? i tried doing a diagnostic but its a pain to get to the ECU where nissan put ti and i cant figure it out.

How long did you leave the battery disconnected? If I'm not mistaken I believe it has to be disconnected for like an hour or two for the computer to reset. So if it didn't fully reset it could still be lit up because of the original problem especially if the engine is running fine again now. Also it could be because of the trouble code. When I was working on my brother inlaws s-10's electrical system once I seem to remeber reading that the trouble codes had to actually be deleted out of the computer using a code reader otherwise it would continue to store it. I don't know if this also pertains to nissans but thats about all the suggestions that I can think of at the moment.

but y would the light go off when i put the new MAF in then turn back on?