I have a 1998 prelude with a jdm F20B swap and im having issues with it, sometimes the tranny wont go past second gear and puts itself into neutral, i know that the tranny is perfect as it worked fine in another car (the other prelude this swap was in) now do i need a different wiring harness or something currently i am running the stock everything ecu wiring harness ect.. i have a f20b ecu but when i plug it in it doesnt work properly engine light comes on and it wont go over a certain rpm, any help would be great!

 

are you using the right tcu? i think the tcu is next to the ecu. i could be wrong