New engine won't idle
 

I just put the 408 in and it wont idle till it warms up. I replaced the map sensor but still didn't help. Also I have the computer flashed but no dyno tune yet. Its throwing codes: p0107, p1154, p0443. You guys have any suggestions?

Codes tell you the MAP sensor has a low voltage, passenger O2 is not switching properly, and your evap purge solenoid is not working properly. I'd check the wiring to the MAP and get a better tune on it. It's not fueling properly most likely due to tables being out of whack and your MAP is not helping. Sounds like once it gets to closed loop and your short term fuel trims start kicking (STFT start normally at 160 I think) in it will run.

thanks for the input