Gauges out

Thanks red ill get a newer one. I did notice when I replaced the gas tank and sending unit the gauge never read full with the new ivr unit in. Is this related or is the sending unit off.
No simple answer for that. The aftermarket fuel senders aren't correct reproductions of OEM. They normally do produce full and empty though, just wrong in between. Low voltage from a limiter would make both fuel and temp gauges read low.