1984 JDM MAP 4age out of an mr2 in my ADM sprinter
stock ECU

I've been driving my 86 around just fine for the last couple of weeks
went to give it to it today and it would hit a limiter at 5500rpm in every gear
i'm experiencing no other problems at all
running fine, idling fine

i went around checking all wires and earths were tight, all appeared normal
fuel supply appears to be fine, new lines, filter, pump is less than a year old

potentially a dead sensor? if so which ones would cause a limiter drop?
has it entered some kind of limp home mode?

i'll figure out how to get codes out of it as soon as i have time