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While running errands today check light came on. Scanned it and the codes were P0171 Too lean (Bank 1) & P0174 Too Lean (Bank 2). Have no idea where to start could be a vacum leak or fuel related. Im getting some pretty hefty detontation at WOT. When i got my tune it was a little to far advanced on timing. Backed it downa smidge and then the detonation went away. That was 2 months ago, do ya'll think maybe the timing is just bumped to high? If so it should have thrown a code earlier right? Im hoping its something timimng realted rather than a fuel pump or intake gasket. Anyone else had these problems?
Oh FYI i threw a P0440 last week think it was gas cap related though (stupid me) cleared the code tightened the cap and it was all gravy baby. Dont know if this info is relevant though.
-Jeremy
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FIXED IT! I think im going to switch out my Service Engine Soon light to Hey Dumb Dumb light. Went out to go clean my MAS and ran my hand along the back of my intake tube. . . . . Crank vent tube was unplugged!!! Dont know how it happend b/c i havent touched it in months but all well cheap fix! 
-Jeremy
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