Hello all I have a 04 2.0 (2slow) other day i got the code p0300 random miss fires changed out the wires and plugs and then the code came back and so changed the coil pack and its better but now when my car is at idle it seems rough and rpm drop 100-200 rpms ( not thounds) but you can fell it so i changed my fuel filter and put new k&n filter in and still has rough idle in park nutral or in drive when stopped. what else could it be? i cleaned the mass air flow sensor but same thing is going on? any help would be great thank you all.
04 vw jetta 2.0 108,000