Originally Posted by
SarcasticOne
I'm going to go with one of the following 3 things:
1) spark plugs
2) hpfp needs replacing
3) some sort of boost/intake leak
Hard to tell without some way to get logs though
^THIS (in bold/underline)
Get yourself to a rolling dyno & ask them to check fuel pump booster. Happened to my car early on. Replaced, never a problem since. Keep old pump if modding, get new internals. I didn't keep mine.
3 MPS - Rolling on Pirelli PZero Neros, sitting on Bilstein B12's, stock internals... still makes me smile with the Zoom Zoom.