Is this lean? Is my wideband wrong?

[unicoder]

My car was running fine. Cruise/Idle AFR around 14.5-14.7, and WOT AFRs fine at 11.8-12.2 - Plugs were NGK BKR6E gapped at .028

Now all of a sudden, I'm idling lean 15.8-16.5+, cruising crazy lean 16.5++, but WOT is fine. I could only get a 14.7 idle when cold starting.

The only change I made to the engine was run a hose from my valve cover breather to the intake pipe pre turbo, but after the MAF. It had been vented to atmosphere beforehand

I went and got some NGK BKR7E gapped at .030, now my idle and cruise is back to 14.7

But anyways the plug looked leaner than usual see the picture. I know a good plug has a grayish white ground strap, while you have a black ring around the base, but this looked a bit more white than I'm used to