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.

 

[rusty ol ranger]

Try pulling codes see what you come up with

 

[blue.bomber]

Try pulling codes see what you come up with

to afraid of it dumping to much fuel in the cylinders before its able to get any type of codes

 

[blue.bomber]

any help is welcome im in desperate need of fixing this issue i have no clue what it could be

 

[Terrys87]

Map sensors are known to go bad. I am not sure how to test them, I have a spare that I use to replace/test. Your Idle Air Control Valve just may need to be cleaned. Carbon builds up on it and it has some control on the TPS. Make sure it is cleaned and the valve is moving. I would give the TPS a good cleaning and all ports are open and letting air flow as designed.

I would also disconnect vacuum line to the Fuel Pressure Regulator and see if there are any changes. I believe you can rent a fuel pressure tester from most parts stores and test to see what your fuel pressure is.