I have the Autometer gage pod with the fuel gage. My original fuel gage is still functional and connected. Th Autometer gage reads from empty to 150% of full and the original gage reads normal. Could I have the wrong Autometer gage or is there a way to calibrate so that it uses no more than the full range of the gage?

Whats the number on the guage?
Is it a 5714?
I just replaced my existing 5714 with a new one . . .
The old one was reading way past the F . . almost pegged

Suggestion:
Remove the stock gauge
Hook the autometer gauge up with alligator clips
GND to ground
I to 12V power
S to the tan signal wire from the sender unit in the tank

Unhook the tan signal wire
Take the clip hooked to the S terminal and touch it to the GND terminal

If the gauge goes to E its OK if not the gauge is bad

This gauge is a 0 -90 ohms unit for GM cars
0 ohms (or to ground) equals empty
90 ohms equals full

These gauges are senstive to any power surge

I had my external voltage regulator go bag and I think my gauge saw 18V

Let me know how you make out

Good luck

John

It may be that both gages are ok and the sender is putting out more than 90 ohms. I'll check that with a meter. The sender is not in the tank and both gages go to E when sender is zeroed so I think it is 0 ohms the top end may be greater than 90 ohms.

Is it the original sender unit?

They should all be 0-90ohms

Let me know what you learn . . it may help me out as well

I am still having some issues with my sender

When the tank is near empty I am only reading 1/2 Full on my gauge

I need to check the ground on the sender unit arm

Thanks

John

I tested both of the sending units. The old one was 0 with no change when moving the arm. The new goes from 0 to 90 ohms. I disconnected the old fuel gage and the autometer now works fine.