need help with swap 4.3-5.3

[ducky]

ok..got it fired up...nelson tune did the trick...for some reason the transmission is in safe mode or whatever...it only gets 2nd and 3rd...it was fine before the swap...and it has a miss...and the check engine light is on....but...i did get to drive it today!!!

how long did you drive it for? I got some wierd stuff the first few times I fired it up and had it running. Let everything re-learn, fixed my sweet pushrod problem, and it still ran kinda bad, then one day it like did a small "choke" where it like backfired or something.. then it started running perfect.

[Wtfan18]

how long did you drive it for? I got some wierd stuff the first few times I fired it up and had it running. Let everything re-learn, fixed my sweet pushrod problem, and it still ran kinda bad, then one day it like did a small "choke" where it like backfired or something.. then it started running perfect.

lol.... odd. then the beatings began