When you put in your TPS did you 1) Get the right one, and 2) Set it per TSRM? There are two (that I know of) different TPS for the MKIII Supras, one plastic and metal and one all plastic. The rotating piece on the inside is 90 degrees different from each other, so I would verify that when your TPS is installed that your throttle body actually spins the inside of the TPS. After doing that, look up in the TSRM the resistance Specs for the different check points on the TPS and make sure they're in spec, otherwise you'll keep getting that code.
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1989 7MGTE R154 Targa Top White Package w/Blue Interior
Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels
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