So I just recently did a bed swap on my 88 pioneer. Fortunately the gas tank wasn't as big of an issue as I thought, it bolted right up. I went to turn my truck over to get it back home. It didnt start. I noticed that my fuel gauge needle was burried all the way to the right. Past the full mark. Before I take it to my mechanic, I was wondering if any of you guys had any advise on what could be going wrong.