i only use premium gas in this car, but my continues to stall for lack of gos flow. i can be traveling at full speed and it will break down while i'm driving it will slow to almost 0 mph. Please help me out! I have this car fueling system revamped for 23,000.00 in february. I have tried gas treatments(chevron techtron) per dealership. I'm in need of help and almost scared to drive it. I do'nt think that my fuelfilter has been changed.