I have a renegade 800 with fuel injection. Someone siphoned all the gas out of the tank and left the cap off. The machine was sitting outside and I really don’t know how long the fuel cap was off but I drained the tank and put new fuel. Afterwards when I start the engine, the idle speed is at 2500 and will not come down. Have since drained the tank , replaced fuel filter and added fuel injector cleaner. Nothing has changed. Hopefully one of you can shed some light on this problem for me. Thanks in advance