snb13

16valver, for your mileage problem, check out the air bypass valve on your AFM. It came with a little round cover on it like the one in the upper left of this picture. Often people will remove the cover and adjust this valve to set the idle instead of setting idle at the throttle body.

If it's been tampered with, close the valve and then open it back up 1.5 turns to get it pretty close to factory.

16valver

snb13, I've actually done that already. I think it helped (mine had definitely been tampered with), but my mileage still isn't perfect. I would suspect that the vac lines are one of the last remaining issues. New manifold is coming thursday and vac lines will go in with that.