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Fuel sender wits end 66 coronet

ram250098

ram250098

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Location
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I have done many fuel senders but I am stumped.
My gauge was not reading right so I got a new sender...checked it with a meter and it works.
Installed it today and no reading at all.
Grounded blue wire and fuel gauge pegs full.
Checked the wire at the tank with a test light and got a pulse..changed voltage limiter and still got a pulse of light but a bit dimmer.
Added a ground right from the sender to body and still nothing. The condenser on top of the voltage limiter is not hooked up but that should not be affecting the gauge
So gauge is good..power to sender is good...what am I missing.
Thanks
AL
 
Hemi Rebel said:
Youre missing ground
Click to expand...

He probably ain't missing the ground if it pegged when testing it. I had the exact same problem with two new units. Thought the first was bad so I got another, same problem. It ended up being the floats were JUNK. Both of them had small pin holes. I got a plastic float and both of them worked fine. The Chinese don't know how to solder to well.
 
Thanks guys, missing ground? I have a ground at the sender to body,or do you mean at the dash?
The condenser has a wire from it but not connected to anything, IO thought that was just for noise reduction.
The one I took out read ok with amp meter and the float was fine?
AL
 
Well pull it back out and see if the float is full of gas. There is gas in the tank, right? When you grounded the blue wire and pegged the guage, are you running your ground from the sender body to the same place?

- - - Updated - - -

If you have power to the sender, from there it goes through the level sensor resistor to ground. So either the float is sinking like justglazin said or you have an open circuit in between where the wire connects to the sender and ground
 
Thanks Rebel, the old sender I took out when full only read 1/4 tank and it had no ground.The temp gauge seems to work fine which I can't see it being the voltage limiter causing the fuel issue. I did pull the sender out again and the float was fine.
The sender did read ok when I used the amp meter...I am stumped!
AL

- - - Updated - - -

A buddy of mine checked the voltage on the blue sender wire and said it was 10 volts...my volt meter didn't read show anything..maybe crappy meter lol..anyway if it was 10 volts could it have fried the sender?
AL
 
I use the meter to read the sender outside of the tank, to make sure it had the correct empty and full readings.
I would hate to think it is the sender, never had a problem with any U.S made parts.
AL
 
jusglazin said:
HTML:

If you remove the sender from the tank, hook up the lead and ground it, move the arm all the way up to the full position, what does the gauge show? Full? You can rule out several things or determine if it's just the float by doing this.
Click to expand...

I did that as well...and the gauge did move to half when the senders float was all the way up. Which again made me think voltage limiter...I have never had a limiter go on me before...so not sure how it reacts..do they just crap out or can they start sending more or less power into the circuit?
I am getting a reading from the sender in the tank so it should move the gas gauge..will buy another voltage limiter today and try that.
Thanks
AL
 
Last edited:
No one I know with a B Body has a gauge that works properly. I record the miles and fuel at around 150 miles.
New tank and new unit in mine. Won't go past 3/4 no matter what.
 
Dennis H said:
No one I know with a B Body has a gauge that works properly. I record the miles and fuel at around 150 miles.
New tank and new unit in mine. Won't go past 3/4 no matter what.
Click to expand...

Mine works. Also, last time i had my cluster out for tach installation, i went over all the nuts on the back, all the guages worked much better after that.
 
I have snugged up the nuts on the back before on other cars and it has made the gauge work..funny out of all the cars I have had 12-15 or so lost count LOL well over half have had a non working fuel gauge/elec problem.
Fixed them all...this is why I am pulling my ...little of what is left hair out ....LOL
What every town needs is a 24 hour parts store..hate waiting LOL
 
We have a chain used car dealer here called carmax. They are all over the place, and run 24/7. Mechanics run shifts around the clock. The one near me has a napa close to it and they run 24/7 too.
 
Well now aren't you the luck one ROTF
That would be handy for those late night parts runs.
AL
 
ram250098 said:
Thanks guys, missing ground? I have a ground at the sender to body,or do you mean at the dash?
The condenser has a wire from it but not connected to anything, IO thought that was just for noise reduction.
The one I took out read ok with amp meter and the float was fine?
AL
Click to expand...
If you do not have a good ground at the dash the gauges will already be pegged.
 
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