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Old 01-03-2012, 11:21 AM   #28 (permalink)
UFO
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Join Date: Sep 2010
Location: Denver, CO
Posts: 1,300

Colorado - '17 Chevrolet Colorado 4x4 LT
90 day: 23.07 mpg (US)
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I have modified the circuit and verified it with VAG-COM that is is not setting the CEL. I left the MAF target at 270, where it has always been (I can't adjust it anyway, my VAG-COM is not registered.) To partially offset the loss of EGR warm-up, I installed a grille block.

I also have a 2-tank baseline (more or less) with the EGR connected using mostly pump diesel. The grille block opening is a bit too small, I peaked 215 coolant temperature on my morning drive, so I cut it out a bit more - it's just cardboard for now. I intend to keep the grille block for the portion of the mileage test when I reconnect the EGR.
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