Ok so here is my problem... 2 weeks ago I drove my tribute and it was less then a quarter tank on gas (I usually never let it go below this but I was running late and made the stupid choice not to fill up... I know, I know...) So anyways, I went back to school, and the truck was left parked at home on a slight incline, my parents then took the truck out for a drive about one week after I parked it. They said it had a very rough idle, and was extremely low on gas (possibly due to the incline making the gas flow to one side of the tank?) and the check engine light was on. So they took it easy and filled it up asap. They drove it once more 2 days later, the idle was a bit better but the check engine light was still on. I came back home again today after about 3 weeks, it has sat ever since they last drove it, which was about two weeks ago like I said. I went to see what was up, and the engine light is still on, the idle is not really that bad, so I need any ideas here... One neighbor said could be the fuel filter, since it may have run out of gas, hence the light. Another friend said a rough idle could be the result of bad spark plugs, or a O2 sensor... I'm going to run an OBD2 reader tomorrow to see if it shoots any codes. But just as help anyone have any ideas? Is this fuel related or just a bad coincidence? I really appreciate any help here, thanks in advance!