Fuel Gauge pegged past empty (Page 1/1) owenspike JAN 24, 01:44 PM I have an 86 GT, and my fuel gauge is always way way past empty, even on a full tank. From my reading here on the forum, it's most likely a grounded wire. Am I right in assuming this, and if I am, how many hours would a mechanic spend working on it? I'd do it myself but I refuse to do any more electrical work on this car. Gall757 JAN 27, 11:45 AM They work on stuff until it is fixed. If you want your mechanic to commit to how long it will take, it's going to be a high number.