A big hello to all, so brand new here! And brand new gator owner, well new to me gator, it's a 2010 825i xuv. So not being a mechanic just wondering if anyone here has an idea on why my gator when running somewhat full out when the gas is let off she burps and pops then when stopped you can see flame exiting the exhaust, not sure if this is a timing issue, somehow overfueling, or new injectors need to be replaced?? Any idea guys or gals?

Iam passing on thus one but mostly these backfires are fuel related.
Is there fresh gas in there?