2.9 idle problems

[blue.bomber]

hey everyone i have a 2.9 v6 with over 400,000k on it, i just finished my manual swap and a one wire alternator upgrade ever since then i cant get it to idle properly with the map sensor plugged in it just makes it rev out and when its unpluged it just dumps fuel and idles fine i think it may just need a new map idk why it would just break out of know were, did new spark plugs checked everything for vacuum leaks nothing i you guys have any info on how to fix this problem that would be great also those wires on the left unplugged are the old alternator wires not sure if them unplugged has to do with anything and that lonely orange ground wire im not sure what that goes to was attached to the bell housing if that helps maybe by previous owner. if anyone can point me in the right direction that would be great thanks.