200Q 20vT + VAG-COM = Driveability problems?

[Kneale Brownson]

Check the condition of the wiring at the WGFV.   I had one corrode and then break.  Had intermittent good and bad running before it finally failed.
   
  See the green stuff here:  http://www.pbase.com/kneale_brownson/image/41941930
   
  Bad pix, but see the cracks:  http://www.pbase.com/kneale_brownson/image/43360819

cody at 5000tq.com wrote:
  
This 200 is 100% stock, with the N75 valve and such exactly OEM. 
Possible that the N75 was stuck, but would be a huuuge co-incidence if 
it onl;y stuck when the vag-com was plugged in and never before, never 
since.