Just wanted to throw out there that I think that the V6's(mines a 3400) need to be non-pe tuned with the factory nb's. I used the WB to tune the lower reigon of the MAF and could only get within a couple of %. Fought with this all year. Last week I tuned using the LTFT/STFT method andd finally got that elusive 0% trims
Then, day before yesterday, I reinstalled my WB and started with the PE again. My MAF scale no longer has a dip between cruise and PE and, here is the kicker, I went from a peak torque of 190 to 218!!!! Now keep in mind that those are #'s reported by the scaner, NOT ON A DYNO. But, there is definately a huge improvement there, I can really feel the difference in PE.
When I tuned with the WB it left a strange dip in the 6000-6500 range on the MAF table. Now my MAF is a nice steady rise into PE and I'm sure this has a lot to do with my results.
Just an FYI....