My gas gauge does the same thing in my 90'. It only gets accurate with about a 1/4 of a tank left. And my speedo cable is jumpy around 30-45 mph. But these things dot really bother me that much, so I'm not planning to fix them any time soon.
Sent from my GT-P3113 using Mustang Evolution mobile app
2000 Mustang GT-Former giggle gas addict
1990 Mustang GT w/ Vortech V3
***resident gun idiot***