hi all ,when i just pull the throttle back a little bit and let go straight away in the engine bay on my 1997 gti 8v near where throttle attached there is a air sucking noise, have looked at pipes and cannot see any deteriated hoses or splits is this a normal noise on these cars or should i investegate some more ,as my car failed its mot on emissions and someone said it could have air leak ,just cant see anything more, just here that noise of sucking air.thanks for answers carl
