I pretty much have the same problem....engine cuts out momentarily at high RPM's while accellerating rather rapidly. (like you might getting onto a 2 lane highway when they are all going around 60-65 mph) I have had the wiring harness replaced and the fuel filter also. I also have a new ignition module (not cheap) new coils (one was busted), and recently, new caps and rotors.
Yet still I have this phenomenon. I suppose about he only thing left to throw at it (besides the kitchen sink) is new plug wires (cheaper than the module, but still nothing to sneeze at)
Then again, I could get some holy water and throw it on the engine...if it catches fire, I'll know for sure what the problem was...

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D