Hey Guys I have an ex Federal Police 2003 BA xr6 turbo Stock. It has been pretty good so far but now it has about 185,000 km. Over the last few weeks I have realised than when I rev it out ( beyond 3000 rpm ) it refuses to boost and the engine sounds like a "farting machine gun" ( almost similar to what happens when tractions control is going off - even though its not on ) I noticed this a few weeks ago - and only happened once in a blue moon but now it is happening more and more often. Any idea what it could be? possible my turbo on it way out? or just something loose / loosing boost pressure somewhere? Also it has been making a blowoff valvue noise for a while ( last 9 months or so ) even though I didn't fit it with any after marker BOV ( guys at ford say it was over boosting )