My problem with my car; help(gas econ)

[Lafiro]

Well, three days ago, I was suppose to fill up the tank when it started blinking. Well stupid me ran it for another 65miles or so, and ended up running out of gas. The engine kept turning off and on, while it was rolling still in Drive, and I didn't know what to do and was on the service road.

I didnt apply the brakes, but kept on going when I relalized the closest gas station was just 3 blocks away! My mistake was trying to start the engine like 7 times.

Well, anyway, pushed it into the gas station, witht he help of a very nice downhill into the driveway, almost crashed into the car ahead of me. i applied both e-break and regular breaks and just came that close to hitting him. Really had to press hard/lift with a lot of force for it to stop.

Anyway, filled with gas and was on my merry way.

Today, I notice a pattern that is pissing me off. I already did a oil change 500 miles ago, and I checked all fluid levels. The pattern is that, the car seems to be lacking a lot of power. Even with everything turned off (amp/stereo/HID's/Heat) Oh but thats not the part that is getting to me the most. Its that the first bar of gas was gone at 33miles. the next at about 65. And today the third bar was gone at 110miles. usually I would just be getting to my second bar at this point. Im not even abusing the engine, and like I said ti seems to be sluggish, holding gears, not accelerating enough.

It also drops speed when I let go of the gas at almost any speed. Before, especially when i noticed it during the summer, the car would always kep a constant speed after letting go of the gas pedal. But not it just seems to drop as if the e-brake or something is somehow being applied constantly.

I really do not know what to do. the last tank I ran out of gas after 336miles. I did abuse it the whole time though, so thats probably why. But why the heck is the car doing, I dont know, maybe 20-25mpg, instead of the usuall 30-31?

I have also openned the intake and the filter looks clean and nothing is inside it. So what the hell can it be!?!?!??!?!?!!?

My only other thought, is that something went wrong after my dealership did the oil change, or me running out of gas and trying to get the engine to start anyway a few times somehow messed with the fuel intake in a very bad way.

Someone please help! Give me some suggestions please before I take her into the dealership with this stupid problem. Thank you all!