[Greg Reid]

Either it's bad or you have a bad connection to, or integral to the sending unit. I can't remember without going through the entire thread again...but I think that's what Jay had. Like a bad crimp connection or contact integral to the sending unit.

[Patina Tiger]

Yes,

It is the little retainer cap that is on the underside of the sending unit, electrical current gathers corrosion there due to air exposure in the tank over the years. Carefully pry off the cap and clean the brass fitting and thin metal strap. After done, set the unit in the trunk, (for ease of testing), and ground with key in the RUN position then move the float arm up and down for reading. Should be good, then install into tank.

Alex

[Greg Reid]

And from what I've been reading here on the forums, it's worth fixing. I understand that a lot of the new units bought at the parts stores are failing within a year or two.
These originals last 40 years easily.

[geiser]

I have been doing quite a bit of reading and have a simple question. Does the center trunk body plug line up with the sending unit?

I put in a new sending unit and tank early in my rebuild process (before the dash was in.) I found the harness was not connected on either end in the trunk after the dash was put in. I currently have a full tank. I really don't want to drop the tank to connect the harness and was hoping to pry the body plug open to connect/fish the harness to it.

[lazlo]

Originally Posted by geiser

I have been doing quite a bit of reading and have a simple question. Does the center trunk body plug line up with the sending unit?

I put in a new sending unit and tank early in my rebuild process (before the dash was in.) I found the harness was not connected on either end in the trunk after the dash was put in. I currently have a full tank. I really don't want to drop the tank to connect the harness and was hoping to pry the body plug open to connect/fish the harness to it.

Two hoses in the filler neck, at least one down in the fuel. Seal the two hose with a rag to make air tight as possible. Set a couple of 5 gallon buckets on the floor to catch the gas. Stick an air hose in one of the two hose, give it air and watch the gas come out the other hose. This very effectively causes a siphon that will empty your tank, without the nasty aftertaste...