better rich than lean!!! hows the TPS set(what voltage), does it still run rich without the airfilter on the car? stock O2, or wide band, or both? do you have a rom tune, stock tune? is there an adjustable fuel pressure regulator? WTF? there are very few things that change fuel on SR. TPS, MAF, O2 reading. if car is running suuuuper hot the car will compinsate with adding fuel, if the altenator is not functioning or putting out very little voltage the car will run rich. there are so many varibles. do you have an external relay on your fuel pump?? stuff and some things!!