Something to do with DBW delay I suppose davidke20

drive-by-wire delay, as in, the throttle valve is slowpoke to respond to your gas pedal input.

When you release your gas pedal and press on the clutch, the clutch releases the flywheel but the engine still think you are pressing the gas pedal, therefore it will rev (macam revving in neutral) for a split second before dropping to idle RPM.

How to fix this? kenjilew
Already driving mana datang autochoke 

my blm manual also like this, i tot is normal? 
when the first time i face this sudden rev, my mind told me ada hantu help me rev

shift neutral, release clutch, let the car rolling and vroom without touching any pedal