Engine surging when engines is warmed up

Have done that already, thanks for the info on the system going into closed loop. No leaks at manifold cracked hoses leaking hose or intake to air cleaner cracked or leaking. I had the MAF off of the filter try and observing the flow plate moving and gently augmented it during the studders, hard to do but it seemed to help but it was so hard to manipulate it I could not do it real well to be sure it was the issue or not. Popped it with a screw driver thinking it was stuck as well. All this happened when I took the valve cover off to replace a leaking gasket. I had to take the throttle body off as well to get the cover off did it years before no problem. Pulled the throttle body off a second time just now and the gasket made a perfect seal as evident by the crush patch on the gasket when you use gaskacinch on gasket they come off in one piece to tel l the tale. There are 2 tubes one to the heater water pipe the other to the IAC BPA that were pretty clogged up so I just made a loop pipe from the heater port to the IAC BPA which them goes back into the block. I played around with it and got varying results the best being blocking the line from the heater y pipe and letting the other pipe to the ICA BPA be blocked the other sied goes directly into the block and senses the water temp from there rather than the flow the way it senses with the "u" pipe setup it obviously gets too hot that way from what I am seeking. I think possibly the line going to the throttle body dropped some of the heat there then on to the ICA BPA. I will hook it back up this time the original way and see what happens before the lines were pretty clogged up so it got little flow and just senses the temp from the water more or less stagnant in to line coming to it from the block. I do not know what I did this time any different than before to have gotten this issue. One other side not I just got the car smogged and the one lead line you are suppose to ground out to check the timing is set correctly, when you ground it out the engine shuts off immediately like you shut off the ignition switch so that is why I have been fostering the idea the ecm may have an issue. I should have just let it leak put down some cat sand on the drive and rinsed the engine off one a week and avoided all this.