The 262´s engines didnt have any computed control to control the incoming air/fuel ratio. So your throttle is the only control and if thats why you´ll get an engine stall/compressor stall pretty quick, which the result that the fire from the combustion chamber is beeing force forward, into the compressor and usually damage and burn this area since its not made for this kind of heat.
Pretty much what Yogi said.
But the fire from Il2 was wrong in my eyes, even if you put in too much fuel, it will flood itself rather then burn like in il2. Results the same, engine failure 😄