Absolutely, not the DIY guy (or gal) kinda stuff, but it really showed me that with just a basic meter like a VOM that can read hertz, that you're not going to get proper readings like you can with a good scanner!
I discovered something today, the gas line that connects at the injector feed weeps gas ever so lightly when played with. So I wonder by the way that it connects if air is being siphoned in after the throttle body (hence the high O2 level in the exhaust)? The o-ring must be worn, so for 20 bucks from Autozone I'm going to replace that, the connector and part of the gas line in the engine compartment, then I'll reconnect the MAF sensor and see where I'm at? I can only hope - I'll keep you posted.