Was like it when I got car all the other gauges seem to work fine.

 

I've got Kinda the Same Problem. My Speedometer Dose'nt Work, My Tach is off, kinda displays Speed when in 4th gear LOL. Gas Guage is off by 1/4 and Temp Gauge dose not work at all... Voltometer and Oil Pressure are the only 2 working in order...

 

my gas is off by a little also

maybe its the same problem lol

 

One of the likely candidates is the speedo gear on the tailshaft has slipped off and is not meshing with the gear on the speed sensor where the wire plugs in. Are you also getting an SES light? If not, then it could be a bad wire going from the computer to the dash itself.

 

I am getting the SES Light for it after it runs for a while were talking 20 minutes. i'll have a look at it. When i get a good day's weather i'll post back my finding's for the other guy having trouble. Thx Kevin91Z for the Info