so i took my car gs4 to the dealership and they did a diagnosic on it, they said the codes where p0300,p0301,p0303,p0305,p0307,p0446,p1346,p1349, they said its just a bunch of random misfires probably caused by the timing needing to adjust(i dought thats wat it is) or my vvti sensor needing to change. Does anyone have any suggestions.

 

I had the same issue, with the same cylinders... all drivers side. Turned out to be a problem with my fuel line, but I was running a return fuel system for the supercharger.

 

my car is stock for the most part so i wouldnt think the fuel return line would be it but thanks for the input though

 

yes, but it could be the fuel damper or something with fuel on that side as well. I would think timing might affect both sides of the motor not just the drivers side.