Car running like shit and running rich

Hey guys, whats up? Okay so heres the thing. I recently been shit on by my car and i did a diagnostic test on it and it said there was a MAF malfunction. I bought a used one for $50 at a junkyard and still the same problem. However, it does seem to be running just a tad better. Does anyone know what it could be? I mean the car smells really bad from the rich burning of fuel.

Thanks in advance guys!

Ray

you probably replaced a bad MAS with another bas mas. However, it could also be your 02 sensor is shot so the ecu puts your fuel trims into "safe mode" and runs like shit.

car might be in limp mode?

I had the same problem that you did but mine ended up being the number 2 injector was leaking fuel....you might want to pull the plugs and double check them.

car might be in limp mode?

Same thing as what crunchy mentioned.