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Misfiring issue

norwegianGolf

Norwegian
Location
Norway
Car(s)
2006 Golf GT
Hey guys, newbie from overseas here! :biggrin:

So my 2006 GT 1.4 170bhp is throwing some heavy missfire when I floor it in the RPM range of 1000-3500ish.

On the higher RPMs its totally fine.
To me that sounds like the problem have something to do with the S/C(?)

My VAG-COM gives the code P0304, which says that its only misfiring on cylinder 4.
I've tried to change the spark plug and checked the coil, but it appears to be fine. I have not tried to swap coils with another cylinder yet.

I find it odd if the problem is with the S/C, when it only misfires on one cylinder. Unless it could be leaking boost into the cylinder?

Any ideas on what that could be? Or anyone that have experienced the same?
 
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