Recently On my 03 5.4l,the gas gauge has gotten all screwy.. It happens intermittently while driving, parked on flat, parked on hill... I noticed one day that my gas gauge was moving.. Not just a little, but a lot... So i started paying more attention to it to try to verify what I thought I was seeing and a couple days later it happened. Was sitting in a parking lot with the engine running and the gauge going down from about the 3/4 mark to half and back up. It did that a few time and then stopped and went back to 3/4,where it stayed. The next morning it did the same thing, only at the end it went all the way down to empty, bounce a few times to random spots and settled at about a quarter tank. I know I had about 3/4 of a tank as I had filled up 5 or so days before hand. So really I assumed that I had that mush based on past experience. I've been watching this issue for a couple months, sometimes it doesn't do it at all. And sometimes it's really bad. Like right now I am 180ish miles into a full tank, yet the gauge reads a under quarter, when it should be closer to the half mark Anyone else ever experience this?