my gas milage has gone down the drain..
could this just been caused by that problem before i fixed it, i havent put gas in since before the problem. thought i would ask anyways.

had the CEL on for 3 days before autozone came up with the code 157 then i cleaned the MAS which was very very dirty, engine running correct now..but i noticed i havent drivin much and my gas tank is lower then it should be.

Are you getting all pass codes now?

Did you reset the computer after cleaning the MAS?

what is the MAS, mass airflow sensor ? What method did you use to clean it ?

yeah i am goin to take it to autozone again to make sure...

seems all my problems started when i installed a new stereo in it...