One thing to try if you havent already, have a buddy keep trying to rev it up and mess with all of the connecters under the hood. My friends nissan had a pin break off of the maf harness connector, Looked like everything was fine but it was loose inside the connector.
yeah i have checked all that stuff pretty thouroughly. The stock wiring harness on this supra engine kinda scares me though. alot of the wires are corroded and coming apart at the connectors. I have had to replace three connectors already because of corrosion and old brittle plastic that keeps breaking.
