need help on this acceleration noise.......this morning i hear a weird noise from my car......only when i shift to second gear release the clutch and press the gas, only when i press the gas and samething with third gear and up.......no engine modification just short shifter......

 

the sound shoud comes frome your speaker, that's mean there are some + wire very near those speaker wire; for example! the amp's out put or in put head is loose or had bad connection. It'll be difficult to find out the point. Good Luck!

PS: Is the sounds like "Wi~ Wi~Win~~~"? BINGO!!