Originally Posted by cn555ic
Your issue sounds like mine when I had a faulty low pressure fuel sensor. Look up my threads on HPFP. I thought it was this and it turn out to be the sensor
So if I bring the car to the dealer, do I just tell them to check out and see what there is going on with the car? I know that if jb4 is on map 0 it doesn't misfire. It only does it like you at WOT 4,5oo rpm when jb4 is on. I'm just confused on what I should tell the dealer.. Do I mention any misfire? I need to service it soon too!