[dsraven]

For the codes
The mass airflow sensor weighs the air going in and that along with a few other inputs tells the computer how much fuel to give. Sometimes it can be where the mas is positioned in the stream due to turbulent air flow or it could be a vacuum leak after the mas. Start with cleaning the mas and the electrical plug for the mas. Then look down stream for a vac leak. Also, if you have an oiled air filter, be careful how much oil gets applied because it costs the mas right away. Especially when it is so close. A longer air intake pipe may help get laminar air flow past the mas.