I have run into this prob many times if you have cleaned the throttle plate
Well you may want to try my fix.
I'm a 28 year mechanic and repair this problem on many jeeps, fords,
Chevys ect.. What you can do is drill a small hole in the throttle plate
About 1/8 - inch be careful pu a rag or towel to catch shavings. Put the breather assembly back on and test drive to relearn computer .
Problem should be solved. I also have noticed lots of the newer
Models of cars and trucks already have the hole drilled. Good luck
Brad. Greesemann