So to start off with the 550, when I went to buy it the guy had to give it throttle to start, but it did not smoke at all. It has snorkels and a rad relocate he said he never had it over the gas cap which is on the front fender, he said he put the snorkels on there mostly for the looks. The motors on both of them look like they haven’t ever been sunk so I don’t think it ever got water in the engine, and he said that he never had and he bought it new. Anyway, I brought them home rolled the 850 in the shed and started the 550 but I did have to give it throttle.
He only drove it twice last year so I was going to drain the gas but then learned I have to pump it out, which I don’t have. So I just left it in it, it would only smoke if I throttled it hard and it still wasn’t bad. It runs good once it warms up good, I went for a ride yesterday and the gas indicator started blinking so I took it home, then let it sit a few hours and the gas gauge went back to 2 bars.

#2: I then went out to start it and if I gave it no throttle it would try to start but if I gave it any throttle it would lightly backfire through the air filter. And if I cranked very long it would say on the screen: lo9.6, and would slowly drop if I kept cranking it, so I figured it was telling me it had a low battery. So I pushed it in the shed and put a charger on it, went out this morning put gas an sea foam in it and let it pump twice. Just giving it no throttle it would do nothing, so I gave it a little throttle. And boom! It backfired real loud through the muffler, so I turned of the the key waited a few seconds and and tried to start it again and all it does is click, click, click ect…

This is my first Polaris and my first efi atv and the newest atv I have ever worked on or owned so I know nothing about all the sensors and all the electric stuff which is on them. I am really lost on what I should do.

What do yall experts think it is??? Oh yeah on the ride yesterday I got up to about where the black part of the floor boards ends and where the green fender starts in water, don’t know if this has anything to do with it but figured I would make sure yall now. Thanks in advance!