fuel gauge fluctuation

[machinistmike]

recently i had some trouble with my 99 flex fuel.after replacing every item in fuel delivery system and a ford diagnostics we found the wiring hrness wasnt on its mount @ the back of the intake manifold. after repairing 4 burnt wires we went to the gas station to get fuel and since then the fuel gauge doesnt work

 

[machinistmike]

update.had the chance to pull fuel pump and found out the float was inside the tank.

 

[helpme]

I bet that's what's wrong with mine.

 

[machinistmike]

Whhat kind of issues you having?

 

[Curious Hound]

Isn’t the float supposed to be inside the tank?

 

[machinistmike]

Yes

 

[machinistmike]

Float, pump and sending unit all one assembly

 

[helpme]

You mean the float was floating loose inside the tank.
I saw on Ebay a guy was selling the sender assembly with float separate from the fuel pump assembly.
And a picture of the assembly showed bare connections on the sender rheostat that could contact the fuel.
Not good? Hmm.

 

[helpme]

I went by O'reilley's and Advance and they both had pretty much the same. A Chinese clone for $78.00. Not sure I want to put a Chinese fuel pump on. BUT a Motorcraft is much more expensive. There's a guy on Ebay selling USED fuel pumps for $35 that was salvaged from a wreck. Who knows how long it sat up with jellied fuel inside it.

 

[machinistmike]

Have you checked AutoZone?

 

[helpme]

Went by there today. They have the Delphi brand for $91. Probably a Chinese one too. But I called Genuine and they have the Carter brand for $80 and its supposedly made in the USA.

 

[machinistmike]

For the whole assembly?

 

[helpme]

I think so. For the 94 they may be trying to unload stock. The Delphi brand claims to be all nickel plated with stainless steel internal parts.

 

[machinistmike]

I paid around 150 for mine only because its flex fuel