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Username Post: Faulty Gas Gauge        (Topic#368394)
Custom Sport 64 
Posts: 4

Reg: 05-01-22
05-10-22 05:08 PM - Post#2840997    

Cleaned out the old gas tank & installed a new gas float pick up & made sure the ground was properly afixed w/ dielectric grease. Gauge worked great for a while then needle started going all the way to the right some times then lately it is stuck all the way to the right. Rechecked all of my ground straps - aokay. Someone told me there was some gizzmo on the back of the gas guage that can go faulty?? Any suggestions out there. Thanks


Valued Contributor
Posts: 3816

Loc: Northeast CT
Reg: 06-27-10
05-10-22 08:40 PM - Post#2841005    
    In response to Custom Sport 64

It isn't in the dash unit, it is located in the sending unit in the tank. Most if not all the reproduction fuel sending units today are pure junk. There are companies that will rebuild your old sending unit to work like new. Hopefully, you didn't toss it when you purchased the reproduction. There are a number of companies around the US that offer this service. Google is your friend to locate them.

Never argue with an idiot. He'll drag you down to his level, then beat you with experience.

Frequent Contributor
Posts: 1286

Loc: Orlando Florida
Reg: 07-09-18
05-11-22 05:02 AM - Post#2841013    
    In response to Custom Sport 64

My suggestion is to bench test the sending unit that you purchased. The test involves using a volt/ohm meter and seeing the resistance change as you move the arm.

If you see a steady change in resistance, then you know the unit is working. The rest of the system is simply power and ground.

I'm not a fan of dielectric grease on the ground points as it is non-conductive and can interfere with the ground. You can clean the ground, attach, then spray battery terminal treatment on the ground.

Custom Sport 64 
Posts: 4

Reg: 05-01-22
05-11-22 09:41 AM - Post#2841034    
    In response to junky

Yes I tossed the original unit. Will take the new unit out & test it. Thanks for your input.

"10th Year" Gold Supporting Member
Posts: 3378
Loc: Sergeant Bluff, Iowa
Reg: 01-10-05
05-11-22 11:03 AM - Post#2841038    
    In response to Custom Sport 64

Another problem is that the reproduction floats fail that are on the new senders - they crack and leak filling up with gas making the gauge not read correctly.

I know that a replacement float that fits is a Ford brand float. I remember these new Ford floats were switched( they snap into the holder) by guys replacing their gas tanks with new sending units.


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"11th Year" Gold Supporting Member
Posts: 2004
Loc: Agawam,MA
Reg: 09-17-09
05-12-22 07:39 AM - Post#2841092    
    In response to pvs409 =Year%3A...


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