I have a 95 accord ex and it is stuck at full. I pulled the cluster out and checked behind the gauge and it looked fine. I then pushed the needle down to half and whenever I put the key in the ignition and turn to 1 the fuel gauge goes right back up to full. I am guessing it is either a bad fuel gauge, or the sender unit went bad. Any ideas which it could be or if it is something else. Thanks.

 

Typically, a fuel gauge will read overfilled if there is a short in the wire that links the sender unit in the tank to the gauge.
Conversley, a fuel gauge will read empty if the system looses continuity (open Circuit)

The fuel gauge always reads full regardless of the actual fuel level
- The sending unit is bad
- Sending unit to fuel gauge wire is shorting out
Testing:
Start by removing the wire from the sending unit. If the guage now reads below empty then the sending unit is faulty and needs to be replaced. If the needle does not move then the wire between the sending unit and the gauge has shorted to the body somewhere and needs to be repaired/replaced

P