I found another ECU I had that came out of a 95 Auto 240sx SE model. The sticker says HU is this truly an auto ECU? I put it in my 97 and the car started and ran fine but I still hit rev limit at 6700 so it leads me to believe it may be a 5 speed ecu. I'm just curious I did a google search for nissan ecu HU and got a bunch of headunit crap so I figured I'd ask you guys.