Keep us posted on what you do and find. I did a Ranger for my son's Girlfriend just 3 weeks ago. She had washed and drove it around after but it started acting up. Next day it would start and then die, she asked me if I'd look at it for her.I checked it over and found water in the fuel.Pulled the tank and drained it and cleaned it put in new fuel.Before trying to start it I pulled the end cap off the fuel rail/line and just turned the key off and on a few times untill all I was getting was gas. Put the cap back on the fuel line and it started right up,but took a few minutes to run smooth. I also added half a can of sea foam to help with cleaning the injectors etc:
I forgot to mention that when she washed it she forced water into a frame opening that Polaris puts there gas tank vent into.There was over 1/2 gal of water in the tank.