I have a 2014 polaris sportsman 570, and the fuel pump recently stopped working. I replaced the pump, and spark plug, and put everything back together. Took for a ride, and it started to spit and sputter when I accelerated, and smelled rich fuel smell. So i ordered a fuel pressure regulator, and put it back to gather, and still doing the same thing. I now ordered a fuel injector which I haven't recieved yet. If I keep it below 3000rpms it doesn't do it what can be the problem.