my speedometer keeps going back and forth is therer a sensor that fix this problem and where is it located thanks.

when does the car do this? hills acceleration? we need more info?

it does it all the time

The problem lies with your right foot moving up and down. If you can keep it steady I think it will fix your problem...


On topic... if it is like the oil pressure guage, it might be a bad board within the cluster. Not sure if that one can get swapped out though like the others.

The speedo is part of the main board and not easily swapped out. Has anyone else had speedo problems?

I had them on an 92 Cutlass Ciera. It had the 3300, N-body. It would only happen when driving through heavy snow, though. Never did figure it out, but it would behave exactly how he described....would just randomly sweep from min to max.

it might be a cluster problem also

In my case, on the n-body, I always figured it was the speed sensor getting packed with snow.

I'll venture speed sensor as well.

Yeah... now that that is mentioned, it would make sense for that to be jumping if it was the speed sensor. But I wouldn't discount the Cluster theory completely.