Check the FSM MAF trouble-shooting and specs pages, and disconnect/clean/reconnect the harness connectors to the MAF.If it comes down to it, I believe there are MAF soldering/repair instructions floating around here somewhere and it doesn't sound like anything other than an OEM replacement unit really works.
1972 Datsun 240Z - non op since 1986
1987 Toyota MR2 - 199K+ and counting
1993 Infiniti J30t - 174K+ and counting
1997 Ford 150 - 87K and counting
2003 Saturn VUE - 112K and counting