What a fooking stupid thing to do
Im sick of ripping piss poor systems like this off cars and explaining top the owner his car runs shit and uses loads of fuel because some goon has purposely given your engine an air leak
I know - its a right bodge up job - but when i was new to it all (and had this setup), it made the DV go 'pshhhttt' and that was all i was worried about at the time

, even though the car stalled at every single junction !!