the swap is a lq4 2004 6.0 p59 controller that was out of a g3500 van that had a drive by cable ( but also has the drive by wire feature )the van was equipped with a 4l80e trans ,the nissian has a stick and we purchased a wiring specialty's harness and car runs and drives but needs work on idle and lean condition my question is ,will there be any issues in performance by over looking the automatic transmissions current settings ?
any info would be great ,thanks gmonde