I hope someone can give me an answer. My car seems to be running fine in 1st, 2nd and 3rd all the way to the redline. Once I get into 4th gear at about 6200 rpm it starts to cut out as if it was governed. It just started doing this this past weekend, up until then I could almost redline 4th gear up until 6800 at which time I would let off, which my speedo would show about 158 mph. I am told it could possibly be the fuel filter, but I am not too sure. I'm hoping someone here has a fix it to this. Hopefully it is the fuel filter. Any advice would be helpful. Where do I start?