I have a aem wideband, iam running 10 lbs of boost with stock injectors, stock afm i got 2.5 hardpipes, k&n, walboro fuel pump.. when i hit full boost the afr is a solid 10, when i release the throttle it drops all the way down to 16- then quickly jumps back to 14.8-15.2. My worry is why it runs...