Hello all,
I'm slightly confused in my situation. I bought the VRSF DP/JB4 combo last year from Extreme Power House and installed it without any issues. It ran fine for me. I stored my car over winter with the DP on and when I started it for the first time it ran rough. I knew this might have had to do with the fuel but I had a full tank of 90ethonal free that I had to get through. I ended up installing the stock cat and it ran much better. I ran through the full tank and added new fuel (93oct from Mobile). Bought a new gasket and vclamp from BMW and reinstalled the VRSF DP. Still had the same issue and have a video clip of how it sounds. Any ideas? [IMG]
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