Turbo Problem on Stock 94 Supra
 

I have a problem with my #1 turbo that started occurring only sometimes but now is a problem that wont go away. No matter what gear I'm in when I step on the gas, my #1 turbo starts spinning normally with normal power but almost at exactly 3000 rpm is just stops way before #2 turbo starts. It almost seems like it completly stops at 3000 rpm with huge power lose but may start spinning back up a little between 3000 and 3800 rpms. Above 4000 rpms it seems like both turbo are back online like they should be. Any ideas what this could be or where I should start to troubleshoot this issue?

It's probably a bad actuator, vsv, or electrical connection. Troubleshooting the operation of the oem twins in sequential mode is kind of tricky. I'd suggest reading up on the exact sequence of steps in the operation of the twins, and then use the troubleshooting section in the TSRM to diagnose the problem.