I see where guys are having luck lately by simply cleaning the MAF sensors with some of the new MAF designated cleaners...Real simple to do and I did one last week ] actually my own] that worked out fine [ and it was mas-film, not hot-wire, so I was impressed]
the one I used way CRC MAF Cleaner ..read the directions, gave a shot and cleaned it up real nice. The before /after was impressive.

Might be worth a try....that's how I felt about it, anyway...
Was $6... the ECU will re-adapt on it's own if it solved the problem..takes a few drive cycles.