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Old 04-18-2011, 09:00 PM   #283 (permalink)
Christ
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
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Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
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1. I hope we can't attribute the issue to the grooves. Highly unlikely.
2. What have you done so far to remedy the situation?
3. If you use more t throttle than normal, does the problem go away? Get worse? Less throttle?
4. Sounds like an idle bypass problem, if that engine has one.
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