Boost Problem!!!

[Casanova21]

hi all,
 
the other night i parked up and dropped a mate off after work (showed off a little as he hadnt been in my car before ) only to find that when i got out of his road i had a horrible high pitched screaming sound whenever i went over 2500rpm and that i had no boost what-so-ever!!
 
anyone else experienced this, or get any ideas about what this could be?
 
if it helps, a couple of days ago i did fit a blitz bov (not sure if this makes a difference to finding the cause of the problem?) which still works as i can feel air coming out of it when i let off the throttle.....
 
i had a local mechanic (major petrol head so knows his stuff) check it out, and his initial thought is that it is a problem with the turbos....
 
anyone got any ideas lol, as im praying its not the turbos going lol!!

[buckman67]

a couple of days ago i did fit a blitz bov

I am a great believer in coincidences, therefore the first place I would check is in the BOV region...high pitched squeals and BOV\'s go hand in hand

If you web search there are numerous turbo fault finding webpages, This site    http://www.fd3s.net/boost_problems.html is just one of many. If it don,t work for you there are many others.