Ive looked and looked and cannot seem to find what I am looking for. What is the full and empty resistance on a 87 xj stock fuel sender? Thanks

I would need to look myself, might start here: https://www.cherokeeforum.com/f51/he...ix-links-1397/

Found it in the FSM....hiding under "instrument panel!---- 100*-1365~~~~220*-93.5~~~~260*-55 ohms.

WHOOPS!...right, fuel.

Is that for the temp gauge?Looking for the fuel sender resistance

Empty = 0 ohms
Full = 88 ohms

Probably plus/minus 5%

Well Im putting in all autometer gauges and want to make sure i get the right or the closest range gauge while still using the factory sender.

Grab a 1K ohm potentiometer and pair of clip leads. (radio shack).

Clip left terminal of potentiometer to ground. Clip center terminal of potentiometer to sender wire that normally feeds the gauge, after unplugging from sender.

Adjust potentiometer until gauge being tested reads zero.
Unclip potentiometer, being careful not to disturb it's setting, and measure resistance between left and center terminals. That's your sender's "zero", "empty" "cold" etc resistance.

Repeat, only adjust potentiometer until gauge reads full scale. Disconnect and measure resistance between terminals again. That's the sender's full-scale resistance.

This only works with senders that present a variable resistance....temp, oil, fuel. And it may not work on 97+ as the oil/temp signals are buffered and played with by the PCM

Autometer makes a programmable gauge you might check that out. Not sure of the sender stock resistance
But I know autometers other fuel gauges are fixed ranges.

I put one in one of my old Cherokees an it moved like crazy. When you slowed down or went around a corner the needle moved as much as the tach I put in. You may want to contact Autometer to see if their is a fix for the quick readings

Hmm interesting.

anybody else use an aftermarket fuel level guage?

is a 96 fuel sender the same as an 87. Just read that it is 240 empty and 33 full

My '96 SM calls for 20 ohms full/ 270 ohms empty, plus/minus 5%
The Renix and HO senders operate in opposite fashion.