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Discussion Starter · #1 ·
I have a mk4 tdi 150 and when the windows down it gives a very loud turbo whistle when driving around, is this normal? im only asking this qeustion as im having low mpg's from it, could this be a turbo leak?? cheers yal
 

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I have a very loud turbo whistle from my 150 tdi as well! Im thinking it might be either of the following... turbo bedded in as its on 137k .. or ... very slight boost leak from the boost pipe! It doesnt seem to affect performance or economy at all (average 40s around town and 50s dual/motorway).
 

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Discussion Starter · #3 ·
mines doing average 30s around town and 40s on motorway which aint good, but theres so many things to consider which would give low mpg, im thinking about taking it to a independant garage to find out what the problem is but i would then fix it myself as i know mechanics that could do it for me, but i dont think they will like that
 
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