Vf ss Ute 6.0l harrop 2650 supercharger

[Ss supercharged vf]

Hi my Ute has started running rough under load. A couple of months ago I swapped my spark plugs and it made a big difference but now it’s starting it’s rough noncense again. The Ute also smells like it’s running rich as rich. Anyone experienced the same problem

 

[Immortality]

How long since you fitted the charger and had it tuned?