Re: Gas gauge not working correctly
Remove the wire from the tank sender & ground it. I think it will go to full on the dash guage, then remove the wire from the ground source & the dash unit will go to empty. As i said it could be the opposite, i forget, but if the dash unit does not go to one extreme or the other the dash unit or wiring is faulty.
If any other guages are affected it could also be the dash cluster voltage regulator which suplies the electric to all the guages.
NPD & other mustang soures have a fully electronic unit available rather than the old design. Bill