I do not think that it is running rich, at least I do not see any signs of it on the tailpipe, any other signs?

As for mileage, I guess it has gotton a little worse but I have 205 width tires on the car at the moment. (had to rainy season here in central america - about to put new 195 width on this week since rainy season has finished) Also, depends on my driving style that particular day if I ahve pass buses and so forh, lots of hills (mountains) where I live at 5,380 feet above sea level.

I see that others have placed a Bosch sensor for the ford in the car. Is this that easy? All I do is cut the wires and splice together? Where do I splice? Under the floor mat of the passenger side? The O2 sensor here is a little pricy and I just did the timing chain and tensioner and tomorrow getting new motor mounts installed (also pricy) and need to get those new tires.

thanks for your help on this.

__________________
Insanity: doing the same thing over and over again and expecting different results.

2006 - Suzuki Gran Vitara (2.0 L fully equipped) Like this car so far except for trying to put on the seatbelt.
1988 - 190e - 2.3L - 172K miles (It now belongs to the exwife)
1999 - Chevy Blazer LS Fully Equiped - killed it June 2006
2001 - Honda Civic EX - 68K miles (sold June 2004)
1963 - 220S - Dual Carb 6 cyl. (sold)
1994 - Yamaha WaveRaider (fun to ride)