Fuel sending unit wiring question?

[Miljack]

Hey all,
I installed a new fuel sending unit in my '08 230, couldn't get a hold of a wiring disconnect that CC uses on the original installation (CC supplies the sending unit wires bare) so I used some good "butt connectors" to splice the old connector to the new sending unit.
The fuel gauge is working, but is not showing a full indicator after a complete fill up. I'm showing about 3/4 full.
My ? is did I introduce more resistance into the system using the butt connectors? Should I just order the connector and redo it?

[homer12]

Is the new sending unit OEM? I'm just curious if it is and if the physical float in it would reach the actual "full" position with a full tank of gas. I guess that seems obvious, but for whatever reason I had an old Mastercraft do the same thing to me after replacing the sending unit. I just had to deal with the fact that 7/8 on the gauge meant full.

I would pull the sending unit out of the tank, move the float by hand (still wired the way it is) and see if you can get a "full" reading on the gauge.

[Miljack]

It's the OEM replacement sending unit. It was an exact match for the one I pulled out of the tank. I'll try your suggestion, but it may take awhile as I have a really full tank!