[wagonman76]

I built an o2 sensor modifier. It certainly would lean down the mix, but it would also drastically reduce my mpg. At least it only cost me $11 to build. I also built a map sensor modifier for a few bucks. It actually feels like it gives a tad more power when reducing the voltage by 100-150 mv. But not enough to increase mpg.

Doing some of the ecomods mentioned in this forum has done more for my mpg than anything else. I plan to keep trying more. In another week my little one goes back to her moms and I should have more time to work on the car again.