308QV New Fuel Tank Sending Unit Not Working

It look like a universal thing....so float hitting something it the tank and float arm needs a little bend to fix maybe?

 

+1 to mk e's thought. If the mounting stud are a symmetric pattern, did you pick the orientation that gives the most clearance for the float swing and/or do a rough check to see if any orientation had enough room for the float swing? That other one (with the two piece float arm) implies the float arm length is adjustable/customizable (but can't see how the float arm joins on the one you got to see if that might also be adjustable).

 

If you take the float back out of the tank, then hook up the wires, turn on ignition switch and move the float and see if the gauge register or move

 

Did you shorten the lever arm so the float doesn't contact the fuel tank wall or baffle?

 

Years ago I bought a Dino and found the fuel gauge to be working well except it would never drop below one third tank and stay pegged there.
I removed as suggestion above and I found ALL range worked at dry.

When I reinserted into tank I found there was only one way it fit with full range working, rotated ONE position from where was!.
Six top scews but only one mount rotation works.

I wonder if your sender does hit the wall of these small tanks for fuel?

 

Can you call AW and ask for advice? Mine came from superformance and the lever arm was adjustable. I adjusted to about 6 inches so the floar would clear the tank walls and baffles but still had a reasonable amount of float range. Took a lot of fine tuning and I hope I did it right. I haven't tested it yet because I haven't put gas in yet since I'm still refurbishing the car.