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Hello to all I'm new to the infinity fx35 it started runing rough I need some help I'm getting codes p305 and p0300 I changed spark plugs and codes are still there any help would help thanks
 

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For the P0305 you may have to replace one of your coils. Here is more info on the P0305 code:

https://www.autocodes.com/p0305_infiniti.html

To check you can swap the number 5 coil with another and see if the code changes to the other cylinder location. If it does you now know if it's just the one coil and which one.

With the P0300 it could be bad gas or perhaps an intake leak. Here is more info on the code:

https://www.autocodes.com/p0300_infiniti.html
 
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