SeanMc
NoMoSHO
I go fill up, and I'll get 11 gallons. So, supposedly, I still have 7 gallons of gas left. I've replaced the gauge, same issue. Fuel level sender? Any other ideas?
Tank shows empty
- Thread starter SeanMc
- Start date
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Phoenix
SHOHOLIC
Are you 200% sure you have the 18 gal tank?
SeanMc
NoMoSHO
Yes. I had it replaced, well, twice now. Once because of a leak, again, because the seam split. Right now I'm using a used tank out of 95 Sable.
chrism3784
SHO Member
My gas gauge was broken for over a year, always said empty. Turned out to be the the gauge itself. You can take the gauge from any similar instrument cluster that has a tach, whether be a taurus or sable.
SeanMc
NoMoSHO
Mr Anonymous
Tire Wall
Probably the sender.
SeanMc
NoMoSHO
Where is the sender? In tank?
ultimatesho
New Member
i got a similar problem with the 95.....when the gauge hits half tank im on E
Mine doesn't ever move, but I also have the low fuel light on all the time. I think mine is the sender.
cougarman
New Member
Mine says full, all the time. 
Storm-Chaser
New Member
Also look at the anti-slosh module. It's a PCB (printed circuit board) that plugs into the back of the instrument cluster (lower-left, behind fuel gauge).
The sender is part of the fuel pump assembly. It includes the float and rheostat that the float arm attaches to. You can take your known good fuel pump and swap it into a fuel pump assembly with a known good sending unit. I'll try to take time today to pull apart a fuel pump, and see how "changeable" the sender unit itself is - as it can be changed in many OEM and some aftermarket fuel pump assemblies.
Here's an image of the entire assembly. The sending unit, is the beige box with the yellow wire-lead in the lower-left of the image:
Devin - you still haven't fixed your fuel gauge problem?
And are you working with the same instrument cluster or another cluster?
The sender is part of the fuel pump assembly. It includes the float and rheostat that the float arm attaches to. You can take your known good fuel pump and swap it into a fuel pump assembly with a known good sending unit. I'll try to take time today to pull apart a fuel pump, and see how "changeable" the sender unit itself is - as it can be changed in many OEM and some aftermarket fuel pump assemblies.
Here's an image of the entire assembly. The sending unit, is the beige box with the yellow wire-lead in the lower-left of the image:
Devin - you still haven't fixed your fuel gauge problem?
And are you working with the same instrument cluster or another cluster?
Phoenix
SHOHOLIC
On rockauto you can buy the sender alone without the pump to save a few bucks. Make sure you order the 18 gal one though , they are different.
Also look at the anti-slosh module.
<snip>
Devin - you still haven't fixed your fuel gauge problem?
And are you working with the same instrument cluster or another cluster?
Nope. That electrical stuff is way over my head. I really do need to fix that before I sell my Impala though, so this thread is making me want to go through that again.
Oh, and as I found out, the slush modules in SLOs may be different! I took one out of a Gen 1 SLO and it was keyed differently.
SeanMc
NoMoSHO
Thanks. I just replaced my fuel pump a couple years ago with a Walbro 155lph, and it's working great.
SeanMc
NoMoSHO
Just to test this, I drove all week with the tank on E. Even went to a friends place last night (about 10 miles). After leaving there, I went to the gas station, and filled up...16 gallons. I still had 2 left, heh. Guage now shows it's full, but when driving, it'll move as far as a 1/4 tank down.
Bob Gervais
Wut?
Crank bolt. Definitely.
Shoaz
Studly dood
+1
The gas gauge on the Pumpkin is pretty much exactly 1/2 of what it should be, i.e., it read 1/2 tank when full, and then goes down proportionally from there. It's a pain in the butt, but it still works. I have to run with a full tank much of the time, anyway, for a number of reasons.
I'm not sure how that happened, because it has a stock tank now. I was swapping around sending units when I put the stock tank in and I may have wound up with the sending unit that was in the fuel cell, which was deeper than the stock tank. Doh.
That sounds like a sender issue, if it is mis-reading, more than when it wasn't reading at all (which could be bad gauge, or even a clipped wire).
I've decided that I'm gonna save up and just get a new tank (or get mine sandblasted since it sat for 5 years with less than a gallon of gas in it) and a new pump/sender and just do everything at once. I know it isn't the gauge since the low fuel light is on, and I've swapped the slush module and there is no effect. Gonna be a crummy job, but heck, I've done worse. Luckilly this car was raised on the West coast so I'm not gonna have the same problems everyone else in the country has! :woo-hoo:
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