Got the correct ecm Friday after work, went home and swapped parts. Now with the correct ecm, correct injectors, and correct intake, it feels much happier.

The 3.3L still lacks low end on the 3.8, but it pulls hard and feels much stronger now that it can actually tune decent. It’ll take a couple tanks to tune completely, but I’ve already noticed less downshifting and better economy, combined with the return of it’s ability to actually break the tires loose.....