It's a 2005 Titan I changed the motor start it up but was idling at about 1500 RPMs proceeded to do the idle adjustment relearn since then won't do nothing turn over anyting headlights turn on when you put the key on to the on position – lights go out I've got it to turn over a couple times but will not start since that. It keeps throwing an U1000 code have not been able to get it to do anything for the last 2 days really confused first time doing an engine swap with the computer mostly done old school stuff really could use some help. I have checked all grounds switched the relays around get same voltage at MAF sensor as the battery is it possible that i messes up on the relearn and caused this? Is there a way to reset everything? Please help.