I've had a bit of a bad year, I/ the Beast from the East suffered a full engine failure and ended up with a dodgy rebuild that I thought I had finally sorted.  I was driving to Lincoln today and all was looking good, oil and coolant were great, car was polished, hoovered and I had the aircon re-gassed so it was blowing sub zero, today would be a good day I thought, WRONG.  As I pulled onto the A1 I thought let open the taps and feel the wind.  I put my foot down, things seemed to stutter like a miss-fire and then I got a feeling like floating in zero-G when the misses should have been pinned back in her seat. I said something doesn't feel right but she just assumed I was taking it steady.  I then wound the window down to listen for the whistle and blow off and all I got was a laboured acceleration and loud bus like turbo hiss, literally like the turbo was blowing out through a straw and not into the manifold.  I backed off and drove steady to the destination and then very steady all the way home later.  Every time the turbo tried to work I would get a loud hiss like a bus but very little power, I then got the dreaded Engine light, OBD states its an air flow performance issue which adds up.  I've had a very basic look at the bay but can't see anything broken or disconnected,  the pipes at the front to the manifold look ok, the pipe at the back for the air filter also look good.  Any advice about other things I can check would be appreciated before I take it to another garage to be told I now need a replacement Turbo...

Holed intercooler?

 

You'll need to perform more than a very basic look to diagnose the issue so don't go putting the cart before the horse by assuming the worst.

Everything looks good, no leaks that I can see, when I say very basic I've checked all hose's I can see from bay and all levels and everything is good.  As I said, when I try to put the pedal down its like there is an air leak between turbo and manifold. I've done a simple trace of pipes and all connections good from the bay but some advice on where the turbo pipes and connections go would be appreciated.  I'm a dab hand with hose clips 🙂 

If you look you'll figure out where the pipework is coming from/going to!

 

Detailing your car's engine type would be pertinent to further assistance.

Petrol & early diesel engines

 

Later diesel engines

Hi, didn't consider the pipework for the intercooler, will check all that as well.

 

The engine is a 2.0 TFSI CCZA, I've added a picture for reference.  I've also checked what I can see of the intercooler and there are no obvious signs of holes.  It looks from the diagrams there is a fair bit of pipework to check...  

Hi, didn't consider the pipework for the intercooler, will check all that as well.

 

The engine is a 2.0 TFSI CCZA, I've added a picture for reference.  I've also checked what I can see of the intercooler and there are no obvious signs of holes.  It looks from the diagrams there is a fair bit of pipework to check...  

Just to put this one to bed, was a split in one of the boost pipes.  All sorted and all running A1 now 🙂

Phew.