Based on your description, I really question if that is the problem. These vehicles have what is called a knock sensor. Its purpose is to adjust the ignition timing to the point right before the valves start pinging. The goal is to run the timing as far advanced as possible for optium performance, power, and fuel economy.
The sensor is located under hood, center of upper engine area. It's mounted between valve cover and intake manifold. Here is a picture of it:
My concern is without an engine trouble code, this is a guess.
As far as the MAF, the only thing you can do is clean it. They actually make a special cleaner for it. However, there are no serviceable parts in it.
Let me know what you think about my theory.
Thursday, February 11th, 2010 AT 10:10 PM