This is topic gas gauge sender specs / adjustment? in forum Tech Talk at Northern California Ford Owners  .


To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=028566
Posted by robertrwalsh (Member # 10479) on :
 
When I got my 65 mustang the gas gauge read about 2/3 full when the tank was totally full and about 1/3 full when it was totally empty. I changed the sender first, easier and cheaper. No significant change. I then changed the gauge and the instrument cluster regulator. Now it reads about 3/4 full when it is 100% full. I know this is better than the other way around, but I would like it pretty close to right on. Anybody know the specs on the gauge sender? My old one, which I kept, reads about 4 ohm to about 45 ohms. Anybody got any other ideas about what the problem might be? Thanks.
 
Posted by Stang66 (Member # 10504) on :
 
Are you using a brass floater or plastic?
 
Posted by Tom Renzo (Member # 13165) on :
 
Normally the readings are somewhere around 10 OHMS empty and 90 Ohms full. But did you check the output of the CVR. It must pulse a 5 volt supply to correct;y drive the gauge. I have an old unit in my trailer if i get a chance i will get it and do a reading on it. This is from memory. But read the old units OHMS and compare it to the new one. Normally the sender works or does not work. If memory serves me they were wire wound units and those were really reliable. Hope this helps!!

[ 2013-11-25, 02:12 AM: Message edited by: Tom Renzo ]
 
Posted by Secnd2nun64 (Member # 1431) on :
 
Good luck! Mine has about 3/8 of tank left when it says it's on E. I've tried a different sending unit before with no luck. I think it may have something to do with the gauge.
 
Posted by robertrwalsh (Member # 10479) on :
 
Thanks guys. voltage regular it brand new electronic and does seem to be putting out 5V and the temp gauge is working completely fine (now). maybe I will just dig a rheostat out of the parts box, hook it into the circuit and see if the gauge deflects fully. if not drain the tank and bend the wire on the float and see if I get better deflection. if I remember right the float on the new unit is brass like the old one, but I would not swear to that.
 
Posted by Duncan Motors (Member # 7045) on :
 
nothing remade is as gd as the ori, u might just have to bend that rod to your liking.
 
Posted by Tom Renzo (Member # 13165) on :
 
quote:
Originally posted by Duncan Motors:
nothing remade is as gd as the ori, u might just have to bend that rod to your liking.
That is what we do in certain cases. But having gas when the tank gauge says empty is a good thing in my book!!
 
Posted by robertrwalsh (Member # 10479) on :
 
I agree, but I think maybe 1/3 of a tank is excessive. 1/8 I would be very happy with indeed.
 
Posted by Tom Renzo (Member # 13165) on :
 
Tweek the float arm as Duncan posted. Tried and true repair!!
 




Fueled by Ford Mustang Owners
on CaliforniaFords.com