The Mass AirFlow Sensor reads from 0-5 volts. (i.e. the MAF)

It should be around 1 volt at idle.
4 volts is a good average for WOT at 6-7k rpm.


An Oxygen sensor reads from 0-1 volts.

It should normally dance back and forth around .45v very quickly under light load. It should be .8v to .9v at WOT.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.