I've got a S5 JDM 13B T swapped into my 89 convertible. I'm having troubles with bad idle and the car stalling out. As I'm tinkering around and testing electronic parts, I see that my boost pressure sensor part # is N390. It was always my understanding that N370 are TII parts and N350 are N/A parts. Is an N390 a 3rd Gen part? If so what are the consequences of using that part with my TII setup?

Thanks