I have had this happen often. Every once in a while my VX will not run on its own, I have to hold the gas pedal down when starting and shifting just to make it not die. Then after this happens and I have driven it to where I need to go and shut it off, when I get back in it and start it up it revs about to 3500 RPM and stays there no matter what. This makes it very difficult to stop when I hit a red light or stop sign...as the VX is trying to go go go and the brakes are trying to stop stop stop with very little positive stopping power.