Installed the PLX Wideband today in the Spirit R/T. Based on other experiences here, I installed it in the factory location and use the narrowband output to feed the SBEC. Not sure if this is causing it to read improperly or I have another issue.

At idle, it reads 11-12 AFR
At cruising, it reads 13.5-14.2
At WOT, it dives to 10, the lowest the gauge will read.

The car feels fine and as fast as usual, so I'm a little perplexed on it.

Thoughts?