Weird noise

[No3ntry]

GF has a 1.1 cinnqucento sporting

its making a really weird kind of wailing noise somewhere between 2k and 4k rpm

it only does it in a very small rev range and does it in gear and also in neutral

it is coming from engine bay and is REALLY loud when the bonnet is open

but you can hear it clearly in the cabin when moving


Any ideas ?

Thanks James

 

[No3ntry]

the sound is hard to describe as i have never heard it before

at first it sounded like alternator interference that you get with a ground loop on your car stereo but its nothing like that after about 2 seconds of listening to it