I have an 03 Pajero FM, local... pag umabot ang rpm sa 2000,whether standby or running, there will be a loud sound coming from the intercooler, parang "wwwwiiiiinnnningggg...."...

I tried doing a some testing.. When I disconnected the suctioned (upper) hose of the intercooler, wala ang sound upon rev... Pag yun sa hose(lower) tinanggal then connected upper hose, may ingay pa rin.

Can anyone help? thanks