2004 Mazda 3 2.3L Ignition coils
 

Let me begin by saying that I am new here and am also somewhat new to the car world itself. I took my car in to get looked at after a bad oil change at Mr.Lube had me running my car with very little oil. After diagnosing the problem the guys at the dealership told me that coil 1 was misfiring and it had to be changed. No wanting to pay outrageous prices to get my car serviced I took it home bought a new coil and replaced it. i then started up my car only to have the check engine light still on and the car still having a bad shake. I don't want to take it in to get another diagnostic as money is a little tight. Any ideas? Any help is greatly appreciated.

Any way you can get your codes checked?