there is a hissing or buzzing noise coming from the back of my engine, next to the battery, sounds like a wind up toy car, it gets faster when revving the engine, you can only hear it when ya have ya head next to the back of the engine, any ideas what it is

 

also if i move the conection on the tps, it alters the engine note slightly, could it be a loose wire somewhere????

no one lol?????

tps mines got slight sideways play and it affects the idling when fiddled about with thing its norrmal for old connectors as for buzzing or hissing have you got any boost controller parts fitted near there as they tend to make a bit of a clicking sound

no boost controllers, its right behind the back of the passenger side of the plenum, as you look into the engine bay, just left of the battery

 

sounds a bit like a quiet fuel pump buzz

It'll be the air regulator I reckon,should hiss on idle as that's the only place air can get in!! :D

It'll be the air regulator I reckon,should hiss on idle as that's the only place air can get in!! :D

 

is this the aiv, its not a constant hiss its a sort of whirring hiss if ya know what i mean

All 3 together mate,n/s/r of Plenum!-mine hisses too when I get close enough to hear it! :smw:

AIV is in the wing!

loose pipe comong off the turbo , look down to the left of the battery and you will see the pipes, quick check tighten