Sorry Scott
I sometimes get into fueling a little too much. There are two fuel corrections the pcm can make to the final fueling. One is short term and one is long term. The short term is correcting the fueling right now. The long term value is corrected form the short term value. So if short term is -15 this means that is is taking away 15ms of fuel from the base fuel for that particular cell in the fuel map. If this # stays at the -15 for a calibrated amount of time it will start to change the long term value to a -15. After this happens the short term will count back up and should get back to near 0. Now the long term is -15 and the short term is 0. This would tell you that the enine is running a little rich but was able to correct for it. I would like to see the long near 0.
+- 5. Hope this helps