Gas hand jumpy
is there anyway to fix it like put a regulator in somewhere
You might try going to Rad Shack. Try to get the largest capacity electrolytic capacitor they have that's rated 20V or more, within reason of price. It's hard to tell from their website, many of them are marked "web only." Try to get one OVER 3000 mfd. (That's microfarads)
http://www.radioshack.com/product/i...Name=Type&filterValue=Electrolytic+capacitors
Then go to the resistor box and get a wirewound resistor, the ones that are rectangular box like. Radio shack evidently calls these "power resistors." Get a 1 (one) ohm resistor:
http://www.radioshack.com/product/i...0&filterName=Type&filterValue=Power+resistors
and if not, the lowest value they have. This is simple to prevent the capacitor from becoming a "surge" when the key is turned on.
Wire the two across the terminals of your gauge, Hook the PLUS terminal of the cap to the + side of your fuel gauge, hook the NEG side of the cap to one lead of the resistor, and hook the remaining lead of the resistor to the SENDER terminal of the gauge.
Be careful to insulate everything, or extend the leads from the terminals so you can strap the package up out of the way.
This cap should provide a little bit of "lag" in the needle.
After my experiences years ago with S&W, I wish you luck