pull sensor off intake housing and submerge in 200 degree water. if gauge doesn't move sensor is faulty. the temp gauge usually doesn't go out. However, if you run a jumper wire on the harness it should make the gauge flicker(just to double check gauge). your looking at a $20 part.
Do me a favor, lift car- look at your oil filter - move your eyes three inches towards front of car. it should be brown/gold color.
2nd favor, remove twin tube portion of intake. check wiring harness for any loose wires. specifically a wire with a loop. its a ground wire that needs to be...
unfortunately I don't run the VSV's. I pulled that crap off. Ran a Direct line of vacuum to the FPR. But then, I'm turbo'd. check link, it might help get you closer.
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=EC&P=16
P.S. - what is the exact problem? does it crank to...
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