fuel gauge issues

[pow3rwagon]

I've been surfing around the interwebs with my Google machine for a couple of day to find a solution to my problem but it doesn't seem like there are many other cases like mine.

My fuel gauge operates when I turn on power it rises to 3/4 tank and when I turn of power it slowly fall to 1/2 tank. When driving it anyone's guess sometime it doesn't move at all and I'll look at it a few min later and the needle is on E other times it will bounce a little and every so often it will move to another area. Any ideas would be awesome

 

[theoldsone]

Its probably the sending unit going bad.

I know my car when going up on a hill it'll say i have a little more fuel than when im going down hill. I guess its just how it works.

 

[rollie tatro]

Its probably the sending unit going bad.

I know my car when going up on a hill it'll say i have a little more fuel than when im going down hill. I guess its just how it works.

I have a 1978 monte carlo an the gauge was stuck under e.. the fuse was blown so I put a new one in an now it is stuck pass full.. it won't move even if I turn the key on or off? Any idea why?

 

[theoldsone]

Im not too sure why. It sounds like your guage is busted. If the rod is spinning but the needle is not spinning along (because the needle is stuck) it wont show what the unit is reading. Or you may have high resistance in the curcuit...maybe it caused your fuse to blow.

 

[rollie tatro]

Im not too sure why. It sounds like your guage is busted. If the rod is spinning but the needle is not spinning along (because the needle is stuck) it wont show what the unit is reading. Or you may have high resistance in the curcuit...maybe it caused your fuse to blow.

if I unplug the fuse it won't move.. if I unplug it from the connection by the tank with the fuse in it it won't move.. if I then take the fuse out it won't move.. if I take the cover off the dash and move the needle to e then turn the key it goes back way pass f

 

[truracer20]

Here is a good troubleshooting article,
http://www.americanautowire.com/view-faq/general-motors-fuel-gauge-troubleshooting/