need help 2004 6.0

[dbag77]

my 2004 ford 6.0 idles weird when the ac or heaters on it almost dies and then it idles back up does it about every 10 sec at a light but if in park or neutral dont do it and comming home today it studdered and i kept pummping the throttle and it just ran crappy i got it home gave it gas and alot of black smokeplease help

[Granny]

I would clean the EGR valve first and see if that fixes it and if it doesn't then I would pull the wires to the ICP sensor and if it then clears up then you know it is your ICP sensor. That is where I would start. Good luck.