Possible a boost leak. Check all those pipes as they can hide in 90Deg bends.
Lets start with the basics.... what plugs are you using? NGK .... ?i regapped them going to repalce them with new ones today, also replaced fuel filter and still same thing
I want to know exactly what type of spark plug you've put in there. What is the product code on the plug you fitted?they were brand new coil packs and gapped to 0.8mm
there is a pod filter, other than that it is stock