Hello, I'm new to these forums since I just recently bought my first 1G eclipse. I'm having some major problems with the car now. Recently, the car started to backfire a small bit but not bad. After a few weeks now the car is hesitating real bad during acceleration and backfiring as well, then backfires when decelerating. The car idles rough as well and will stall out if I don't give it gas but once it's at normal operating temp. it will idle decent. The car is missing as well from cylinder 2. I've replaced the spark plugs and replaced the injector as well. I can unplug the plug wire and injector and it makes no changes to the vehicle. Gas mileage is terrible now. When I first bought it, I was getting about 260-280 mile per tank. Now I'm getting around 200-250. I've used the ECU code checking guide and come back with no codes. So I'm running out of ideas of what it could be, plus it would help if I was a bit more knowledgeable with cars . Any help would be much appreciated! Thank you in advance!