as the subject describes.... sounds like its coming more from the right rear than anywhere else could just be my hearing though....

dont always get it, but it seems to mostly come when motorway cruising just in boost when putting ur foot down to overtake..... as soon as I lift off it goes...... happens in lower gears sometimes too but not as much....

ideas please? running the standard re-circ dump valve but have an induction kit if this makes any difference!?

 

hi mate could b dump valve failin 2 close properly is it 97-8 also make sure waste gate solanoid aint blocked with over filled oil hope it helps but not a mechanic just of what ive read mark

 

cheers mate, yes it is a my98 and was running a vta dump valve when i had it but dont like the sound of them so put the standard plastic recirc on.......
where is that solenoid you were referring to?! sorry im no mechanic either!

 

If it's an Sti with a VF24 Turbo, these can moo a bit as you bring boost in slowley. Nothing to worry about and becomes more noticable with a decat.

 

not an sti just a standard my98.... but yeah like you say it is as you bring in boost slowly.....