Very low idle after warmed up

2006 Tacoma 2WD 5speed

Had a wreck, rebuilt the front end. Mostly cosmetic besides the ac condensor, radiator, and fan blade. I replaced everything but the ac condensor. I capped of the ends of the hoses running to it. Other than that, i havent messed with it. Or anything.... it starts and idles fine when the vehicle is cold but after warming up the rpms drop very low. Eventually to 100-200 rpm just above zero. Sounds like it is about to stall out, but doeasnt. Engine is shaky. I cant find the cause. Fuel pressure seems normal even above. Idk where to go from here. Tomorrow i will soap up the engine check for vacuum leakes. If anyone has any ideas as to w
hat may be the reason. Please dont hesitate to give advice.

 

So this was not going on before the wreck?

If you have a scanner and know how to use it, the factory service manual is at the URL below. If not, pay an independent shop an hrs. labor to scan the truck. Avoid guessing games.

http://www.customtacos.com/tech.old/files/05FSM/repair.html