So i bought this Mazda near the beginning of the year. I love it even though its a beater. Runs goodish, drives good. But lately ive been having a misfire come up occasionally. Itll come and go. Happens mostly when im city driving. I read the code and it says cylinder 2. To me thats very helpful because if it was a fuel pump or filter it wouldnt signify a specific cylinder. I swapped out the coil packs and have been driving it since and it will stutter for a split second and be fine. It hasnt come up with a code yet so Im waiting till it does to see if it followed over to cylinder 4 with the coil pack. But if it doesnt and its still cylinder 2 than Im unsure on where tk go from there.

 

Sounds like a coil pack from my experience. If I'm reading right you didn't put a new one in, but swapped positions of the existing coils. My suggestion would be to go ahead and replace the packs, wires, and plugs. Of course that's a money no object suggestion, but I bet you won't have any more misfires. Not too terribly expensive though. I did the same on my son's Protege5 earlier this year. I think all in from a dealer was about $150.

 

It has brand new wires and plugs. The coil pack i swapped over looked like it was older than the other but what confuses me is that if its a coil pack, than shouldnt two cylinders be misfiring? Ever since ive swapped them, when i come to a stop light itll miss once than run fine for a few seconds and keep reapeating. Ive also been adding fuel injector cleaner to the fuel. Its been better than it was before I swapped the coils. But i will most likely replace the coil and hopefully that will solce my issue. I will update the thread shortly after i replace the coil.

 

Not sure about a single failing coil pack causing one or two cylinder misfires? I know my son's car was generating a code, but don't recall the specifics of that code. Consider replacing both coils. Let us know.

 

So ive noticed that when it is in nuetral or park it doesnt do it. Not sure if that makes any differences but its just something I've noticed

 

I have replaced the spark plugs and cool PacksAnd still getting the misfire code. How do you reset the code?

 

And it hasn't gotten any better. It's still dumping fuel and smoking like crazy.

 

How did you read the code? The scanner allows you to reset.

What specific codes did you get?