for some reason my speedometer keep on going up and down on my 92 prelude, i swap an h22 engine it, maybe a wire is loose not sure if anyone know how to fix it or what wire i should check let me know thanks you---exp going on 60-shift to 3 gear the speedometer go back to 0 until i hit the gas then it contiune where it left off....please help

 

check if you damaged your VSS sensor.
edit: and the speedo cables.