2006 Mustang Convertible 4.0L V6: I recently replaced the instrument cluster with a salvaged one from a 2008 Mustang due to a broken temperature gauge in my original. Problem solved but now I have an issue with the fuel gauge. The gauge showed 1/4 tank so I filled up, but when it only took 4 gallons, I suspected a problem. The tank is full but the gauge only registers slightly over 1/2 tank. Any suggestions? I was thinking I could run it empty then fill up and maybe solve the problem...

Salvaged Instrument Cluster Fuel Gauge Issue