Ferrari Mailing List: Re: fuel gauge on 308

[pbennett (pbennett]

The 308 fuel 'SENDER' commonly goes bad, requiring an easy replace.
A faulty gauge is quite rare.
HOWEVER
There is always the greater possibility of a bad ground at the sender (top 
off left tank)
See attached diagram.  The usual 'bad sensor' symptoms are that the gauge 
works fine
above a full tank then suddenly goes to empty, due to a broken rheostat wire 
part way
down the sensor.  (The float arm moves up/down the rheostat).
A bad ground will produce low readings at ALL tank levels.

p

Attachment: FuelGauge.jpg
Description: JPEG image