I had an 88 Supra with similar problems. I cleaned out the MAF meter with hot soapy water and degreaser. I re-installed it and couldn't get it to run for the life of me. Turns out there's a wire filament that is temperature sensitive hung in the airstream, somewhere in that 'honey-comb'. Once it cooled down (next morning), the car ran like it was new. Good thing, cuz' it's next drive was to the dealer to get traded in on my Teg.

Can you get any codes? Toyota's flash the dashboard lights, after jumping the service connector (at least my 88 did).

Good luck.