mass air flow

Autozone gave me 4 trouble codes, A week ago it was 2 codes one saying the "ECM has detected a rich or lean air fuel ratio on engine bank two." The other one says. "The computer has detected a rich or lean air fuel ratio on engine bank 1." The truck only starts rough, and idles rough...

Ok so hears the deal, i have a 1993 ford explorer Eddie Bauer its a great car and every thing works pretty good. it just has two major problems that i cant figure out. First of all when you start it the idle revs up and down sometimes stalling sometimes just revving until it warms up. Once its...