Gas Gauge constantly lowers

[darkiller_666]

I ran out of gas today. Filled her back up and drove her home. Noticed my gas gauge instead of going up, went all the way to the bottom. About 1/8th under E. So i took the gauge face off, moved the needle back to 1/4 seeming how i put 20$ in. It dropped all they way to the bottom again. So i moved it all the way above F and it dropped all they way to the bottom again........
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Any suggestions?

 

[Palmetto_TSi]

buy a new sending unit

 

[Palmetto_TSi]

actually the float is probably stuck at the bottom. go accell and brake hard a few times it might dislodge it, or try to fill it all the way up

 

[sk8dudety]

yea its probably a messed up float or sending unit. I dunno if you'll be able to dislodge it by hitting the brakes haha, you might wind up breaking something else

 

[Palmetto_TSi]

I was thinking it would slosh the fuel enough to dislodge the float, especially with a 1/4 tank of gas.

 

[luv2rallye]

First make sure your dash gauge is working by grounding the solid yellow sensor signal wire on the driver's side sensor. With key ON, the dash gauge should then read full.

If gauge is ok then it's probably an open circuit sensor (1 of the 2 fuel level sensors). You can tell by just unplugging them and measuring their resistance. It should be between 2-50 ohms drivers side and 2-57 ohms passenger side. An infinite resistance is an open circuit sensor and it needs replacing. A stuck float is least likely (if your dash gauge is ok) because in order to read empty, both floats would have to be stuck in the down position. If either float is not stuck down (and they are working) then the gauge will read somewhere above empty.

In fact an open circuit sensor is the most likely thing so do the resistance measurement of the sensors immediately after you test the dash gauge.

If all this is ok then it's either the passenger side fuel sensor's ground wire has lost it's connection to ground, or the wire between the 2 fuel sensors (driver and passenger side) is broken, or the drivers side fuel sensor's signal wire is broken between the sensor and the dash gauge.