Fuel Gauge Issues

Jesse Martin said

It's a new mechanical limiter, a reproduction of the original. It seems to only do the jumping with the new gauge both of the others just go straight to 1/8 tank but those to move much slower than the new one. I'm thinking Dana67Dart is right and it's just the sending unit. I ended up taking apart the original sender and cleaning all of the contacts and it began to work. What I may do is swap the sending unit and float over to the newer 3/8 pickup.

Click to expand...

We have seen threads/reports concerning those aftermarket reproduction limiters. Those didn't work right either. Regardless, they just can't compare with a solid state regulator. Anywhere between 9 and 35 volts in gets a steady 5 volts out. No pulse, no variance, no needle swings.
So... After warming engine, temp gauge to proper reading, ignition switch off, a minute for needles to return home, then switch on again. If this produces a similar needle swing in temp gauge instead of the fuel gauge, or both needles swing, you'll know where the fault is. Good luck with it.