Ok, so i have two problems with my 92 FD. First is a very weird problem i think, my car will buck and shutter really hard at exactly 2600RPM but after that its smooth until exactly 5100RPM then it falls on its face and pretty much kills the fuel and spark (limp mode). Now I've noticed that my odometer isn't on (weird) but sometimes it is and when it is on i have no problems!!!! But when its off i get the above, if i turn the car on and off a few times ill get it to come on and then all will be good....Now heres the 2nd problem. When things are working well my 2nd turbo isn't kicking on i have good boost from the first turbo no problems but it never transitions. Now I've shot the turbo control solenoid and it was bad so i replaced it, still have the issue I've replaced vac hoses, fuel filter, charge control valve (stuck in the open pos still) and plugs, and ECU. Im throwing no codes at all i have no idea what else to do with either of these problems any help or advice would be awesome I'm in Northern Japan so help is very rare if any out here PLESE HELP ME

Mod List
92 FD
HKS Intakes
PF SMIC
Turbo Back Exhaust
Stock ECU
97,xxxKM