Sending unit or zfloat?

[RedHotNRollin]

Awright, i finally got everything working and i turned up the pump. Shes runnin fine, i just wanted to let everyone know. Ive been doin a lot so i never got back on her to give updates.

My new question is, do i need a new sending unit or just the float?

Both my tanks work its just when i switch over to the front tank the gauge is very eratic. if the trucks been sittin for a while the gauge reads accurate, but when i start driving it just goes nuts, it ussually stays up above the full mark?

is it just the 12 dollar float or the 350 dollar sending uint?

 

[franklin2]

There is no way of actually knowing which it is, but if it's a fast erratic reading I would guess it's the sending unit. The resistor material gets worn off by the wiper.

If you want to do a little retro-fitting, you can buy a sending unit from JCWhitney and use it to repair your sending unit. Do a search for it on here.

 

[CDX825]

If it was like mine when the floats cracked it just showed empty all the time.

Hate to say it but it sounds like the sending unit to me as well.

 

[plywood]

I put a new resistor card in one of mine and as far as I know I could do yours also for about $50.00, but it's a PITA.

I suppose even with shipping that would be cheaper but the downtime would be inconvenient.