Fitech idleing issues

Ok sorry I’ve been away for awhile. Been busy working and holidays and such. I lived with the problem since April just on long drives it would come then I’d driving it around town and it would go away but just recently it came back with vengeance. Problem is not going away. even recalibrated the system by setting it back to default and re-entering my parameters still having the issue. Changed the tps also no effect. Starts doing it when I take off from idle when I first start it but blipping the throttle makes it going away sometimes. I made sure the butterfly’s were synced which they weren’t before. I don’t have a regulator, just a line that goes from the mechanical fuel pump to the FCC and to the fitech. I’m gona see if something is hanging up or replace the iac sensor also. Possibly that might be crapping out so I’ll keep you guys posted