Good evening gents. I had my car mapped at AmD a couple of weeks back but as the title says it didn't achieve the expected bhp. Standard figures were 224.4bhp+215.9lb/ft,and after the map it made 244.3bhp+290.2lb/ft. AmD changed my maf as they said it was "counting backwards",I don't know what that means but I guess it wouldn't hurt to replace it,but even after that the bhp wasn't as good as the 260 I was hoping for. They said that it was knocking on cylinder 4,which was probably due to spark plugs or a coilpack on its way out,and that it was running on the wrong fuel(I've been using tesco 99 for ages,switched to Shell now). Can anyone shed any light on this,does it sound right? I am going to give the car a birthday and have it serviced. Should I bite the bullet and get coils/sparks done,and when I do,would the bhp shoot up or would it require going on the rollers again and tweaking? Any information greatly received,I also have the shareware version of Vagcom if it helps. Morgan.