Golden , you got fisrt dibs on Haz's good tester mass air. It's gonna be awhile before I buy any parts. I don't have to pass emmisions next month for lic. renewal , so I'll limp along for awhile.
Looking at the wiring diagram I see how one wire goes direct thru the MA and the ISC without going thru ECU. Maybe that spot(whatever it is) is where they burn out. I wish the FSM had a braekdown on the M.A. so I could try to test components. Maybe I could find some youngster with good eyes and a steady hand to solder new parts in.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.