2018 500 EXC-F won’t start

[chrisdub]

2018 500 EXC-F stalled out on decel, did a few times then finally wouldn’t start (won’t even crank over). I put bad gas in it on accident (long story but basically the good gas I bought got mixed with a couple gallons of very old gas) and right after that it started up fine and after a few minutes stalled. Now whenever the ignition is on there is a loud buzzing from the fuel injector. So while in the desert i took it out, cleaned it, tapped it, etc- no change. Also checked the main fuses, battery connection, tried starting with a jumper, etc. So I bought a new injector and just installed it- no change. Removed the inline filter (at quick disconnect line). But nothing is coming out of the injector (buzzing cuz its dry?)

So maybe I ruined the fuel pump? Or the pump is not getting power.

Does it make sense that it wouldn’t even crank over if it was a bad pump or clogged intank filter??

[chrisdub]

Also... I just noticed that with the ignition on the instrument panel doesn’t even light, horn doesn’t work etc.

[Burnrider]

Check fuses in the rubber box next to the battery. Next question would be why are they blown? More important is to check your ground wire first. If they still use that crummy bolt to the black splash fender it's likely loose as a goose.

[Dansmith1965]

Did you check the screen on the fuel pump?

[chrisdub]

Solved. Bad ground connection at frame.

[shuswap1]

Bad ground, common on these bikes....too many al fittings methinks?

[42A]

I would suggest that you replace the fuel filter in the gas tank also if you put bad gas in it.

good luck,

[az_mc_man]

Hope you got rid of the old gas too. Worst case scenario is it creates a sludge in the combustion chamber from the heat, messing up valve surfaces and binding the rings to the ring lands. I have seen it happen in as little as 25 miles from mixing fresh and old gas.