Ok so I have an extra blue wire with pink spots that comes from the body harness and was connected to ecu pin 1u, but now was removed from that pin because of a brown wire that is really suppose to be there for the fuel thermosensor trouble code 23 that I had extra in the beggining that belonged on the blue clip from the engine harness.I have a 93 5 speed rx7 with an automatic j spec motor and an engine harness for a 5 speed rx7.but I don't know what if the engine harness and ecu is from a 5 speed 94 or 95. So basically ,I put everything together and I ended up with 1 extra blue wire with pink spots and no trouble codes. I tried looking through all of the different electrical manuals,but no luck. I'm wondering if perhaps somehow this blue wire is suppose to still be in ecu pin 1u in combination with the brown wire from the fuel thermo sensor. Please ,I need experienced fd knowledge for resolving this issue so help will be greatly appreciated.