I started my car today and let it idle for about 5 minutes. During that time the gas gauge went from 1/2 a tank to a quarter of a tank. There are no obvious leaks and the carb was worked on a few months ago. I do not drive it very often so I cannot tell you if this is a new or old problem. I am assuming it is a gauge reading error but I am not sure where the problems lies (ie sending unit?). Any suggestions as to how to trouble shoot this problem? Is this an easy fix? If it is a fuel sending unit does the gas tank have to be removed? Thanks.
Could be a voltage drop issue or maybe you only had a quarter of a tank and it just took a few minutes tiil it registered the correct fuel level. Could be as simple as the float on the sender getting momentarily hung up especially if it sits for long periods of time. I wouldn't worry about it until it stops working.
