Could possibly be a clogged catalytic converter. It could be a lot of things actually. From the fuel pump to the AFM crapping out, kind of hard to diagnose online. I'd suggest reading through the Chilton's or Haynes manual on the car. The online TSRM can only do so much, it is for a 1986 Supra which is a lot different than the '82. The '82 cars were kind of oddballs with one off AFMs, vacuum advance distributor, etc.
Try driving it at night for a bit and then check under the hood and under the car to see if the manifold or exhaust pipes are glowing red.
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