when i had a ka in my s13 the speedo worked fine but when i swaped in the sr the speedo is kinda off because when i am on the highway driving with traffic it says im going like 35mph but it goes up when i accelerate and down when i brake what could be the problem?

Thanks

 

1. was your car sohc

2. if so you body harness wiring is probably not wired up correctly

 

oh sorry i thought i put 91 in there, but yeah it is dohc