Gauges Quit Working After Being Parked

Search ebay for "voltage limiter" and "Plymouth" (or Dodge) for a <$30 electronic Vreg that works better. Also, the RTE website. Some have photos showing how to disable the Vreg inside your fuel gage. Electronic ones are more reliable and adjustable to help get your fuel or temp gage reading exact. Otherwise, you could try fixing your integral one, but fairly tricky and iffy.