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Old 07-11-2014, 09:23 AM   #1976 (permalink)
theDreamer
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Join Date: Feb 2009
Location: Texas
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To throw out some help if I can.
I had a similar issue (bank 1 lean code) when I was on a canned GTM tune. We found out it had to do with the MAF/fuel tuning was not 100% and needs to be adjusted. A custom dyno tune seems to have fixed it for me, until a breather hose snapped and my idle can get a little off (being fixed right now).
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