A339 engine problem

[Anonymous1999]

I found out that while flying on crz altitude both engines tend to "go crazy" theyre not shuting off but it looks like theyre not getting fuel and "trying to shut off" but when having apu and apu bleed turn on hole flight its not happening as much

[RicardoLVFR]

strange, no APU should be on whilst on cruise, unless you lose one of the engines or special situations.

you have the engines in AUTO-THROTTLE whilst you fly?

[Anonymous1999]

Yeah engines are in A/THR. Everything looks good after takeoff and sudently N1 of sometimes both engines goes nuts. Then you have to fly on apu with bleed on just to keep engines running