I have been working through a laundry list of issues on the 2003 Ford Focus Se 2.3L I bought my son a few weeks ago. Its nearing the end of the list now and my new headache is starting. I got to drive the car for the first time 2 days ago and it seemed like it had a misfire but it would do it when it felt like it...then I got it on the road and when I got up to about 50 it started doing it bad...if I let off the gas and pushed it again it seemed to help some. This car had sat for about 6 months with 1/4 tank of gas so I have my thoughts that the gas may be bad or condensation has put a lot of water in the tank. I had plugged my scanner into the car but no codes at all and the check engine only came on when I unplugged the coils to make sure they were working. The code that drew that was for unplugging the coils...Figured I would reach out to you guys who have been a huge help to me so far on this car.