Ohm question for fuel sending unit

Hi All,

Hi,

I think your talking about your original sending unit. Varnish and wear on the resistance wire can cause a reading issue. Though the wiper arm may very loose. The unit is not that robust. My 71 sender is fairly easy to whack out of spec, from rust and wear.

A new unit can be adjusted to work well, just you will need your original to use as a template on rebends, and adjusting the ohm range.

Note, you can carefully remove the original resistance board from the unit, the opposite side is usable, as long as the wire is not damaged. Be ultra careful, as the wire is somewhat free to be shifted about on the board. Too much shifting will place resistance out of whack. The winding is close but never truly touching in most of the length. Some are more spread out near the end.

JD wrote: I bought one of the new ebay stainless steel senders like I think you are talking about..... Adjusting the empty or full readings you can bend the Stop tabs for some adjustment,but  seems somewhat high but maybe still possible to bring it down to the 73+  - 13??? . As far as the erratic readings in middle look at where the wiper drags across the resistance wire board. On the one I bought it was coming off a bit in the skinny part and was erratic like yours. I took a chance and got it to where I'm satisfied with it now.I will try and post a picture for you

From what I gather, the resistance board is wound a bit high on resistance. Which may be difficult to correct with very close to oem readings. I kept my sender for when I do start on one myself. Hard to tell with photo, but the resistance board may allow rewinding the wire, or allow for the original to be swapped out.

Though the wire needs to touch the sender frame as it's end is held in place. Being that it's a loose fit, as it is wrapped around.