Glenn,
Good advice about the bits - I was going to do that anyway.
It's a funny thing about Ford parts counter guys - unless you ask for the gasket for a part they don't include it nor do they ask if you need it. That's been my experience anyway. Always gotta ask for the gasket. If I were you I'd go buy it.
I don't think that's your problem, though, as that gasket is in front of the MAF. You would be getting un-filtered air but not un-metered air.
If you search here you can find a list of causes for those two codes. I working my way through them as I get time.
LLL
