[shorod]

The MAF doesn't actually heat the incoming air. On hot wire MAF sensors there is a reference sensor element that is heated and the temperature rate of change of that element as the incoming air passes over it is used in the calculations, but the intent is not that it heats the air.

I've not yet replaced the fuel pressure sensor on my wife's 2002 LS V6, but at one point I suspected it as faulty due to a long crank and intermittant stalling issue. However, once I replaced the battery, that issue went away.

In addition to cleaning the MAF, you might consider cleaning the throttle body as well. When's the last time the fuel filter was changed? You may as well start with some typical tune up items, and check the age of the battery. If it is nearing 5 years of age, consider replacing it before tearing into the diagnostics too far.

-Rod