Help Unwanted Dumping When Cold

[IEATV8S]

Hi Guys sorry its been a while since I posted last but I have been having a problem with my BA lately that has me stumped. (Not hard to stump me )

When the car is cold and I go for a drive under light or heavy acceleration the I hear a noise like the throttle has closed and the boost is dumped back into the intake side. I have not lifted off the accelerator, the car seems to do this automatically. I do feel a slight surge/loss in power. It happens very quickly and can happen in rapid succession (like its having a sneeze attack) at times.

At first I thought I was a dodgy TB so I changed it out with a known good one and I get the same result. I then thought I was a dodgy BOV but I had a look adjusted the spring a few times and still get the same result.

I'm no mechanic but can turn a spanner. Anyone have any ideas?

If it helps its a 2004 BA XR6 Turbo. 2006 Atomic Engine, Plazmaman 1000HP Cooler, Plazmaman 4" intake, Plazmaman BOV, Process West Plenum, GTX3582R.

Any help or suggestions would be greatly appreciated.

Also If I posted in the wrong area sorry.

[FPV TRANNY]

Not a boost leak somewhere?

[IEATV8S]

Hi Tranny. Not that I can find.

Looks like no one else has had this issue.

[Boosted_Falcon]

Times like these it's probably better to get your tuner to attach the computer and look at pids during a drive mate, pay for half an hour of his time and save hours of your own.

Trust me, playing guess the problem sucks!