You listen, the terminology is wrong, fsm, nistune or whatever/ whoever, this is not limp mode!
Fail safe mode would not even be correct as a zilvia.net tech. I would prefer you don't use limp mode to describe your problem. That's all, you just don't understand why, feel me.
I think I know what you problem is, Seriously and I will do it for free, and an apology. Not to me but to the members of the forum.
j/k
You probably have a messed up ecu, and some serious wiring issue.
We need to fix and verify or vice versa the ecu issue. You can't put a known working ecu's in your car. Do I really need to explain this????? You have to put your ecu in a known working ecu's vehicle or
make a test bench<--- maybe not!
After you determine the condition of the ecu, you can send it to me or post HQ images w/macro and I edit them with pretty colors of things that need to be repaired. Now we'll go through your harness step by step and make repairs. I will hate you after this and only love you again, once you get your car running in tip top shape...! You'll hate me either way, be for warned!
I am rambling on but, just let me know if you want the help and we can start you recovery.
Speaking of recovery, I had this one guy keep yelling at me his phone was
"bricked"! Just because he couldn't get into recovery mode, with 3button combo
and because the usb dongle/jig didn't put him into download. I showed him an alternate way to get download mode and he said it worked though a text to me! lol!
GhostlyCoupe, should know first hand that, sometimes they get it wrong!
sorry for the rant and ramble but I know I can help!