I believe according to the post I made, from my service manual, it's your PCV hoses.

You stated they become flat and the post I gave you, stated that the code could from the PCV system.
I wouldn't waste to much time on the MAF.

1996 2.5LT V6 Contour ATX My Tour+help/info pics E0 rims, Gutted Pre-Cats,CTA Custom Exhaust & Intake, Diablo Chip.