Sorry. Forgot about this post. Replacing the valve got rid of the code that was tripping and made lean burn even more predictable. Far from ideal, but this combined with learning the cars ins and outs of lean burn both really helped!
On a side note, I was out at a friends hop and he was working on a TDI golf. It was having trouble boosting and lacked power. All shops were quoting a bad turbo and a $2,200+ bill. After a little invesitgating we found the EGR was clogging the intake manifold with carbon. To the extent a 2 1/2 inch pipe for the intake was clogged so much I could hardly put my thumb in it! Crazy!
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