Driving car after week vacation....
 

My car seems to run more lean then before I let it sit for a week when I went on vacation.

I'm basing this off my Autometer A/F gauge.

Before vacation I would get 2 or 3 bars green at WOT, now I get 1 bar amber, and 2 green. I'm hoping to add a downpipe soon, so this has me a little worried.

Any ideas?

I'm not getting 10-8-10 boost pattern either, but I figure that getting not enough boost should make me more rich, not lean.