Too much AE can cause a stumble too. Too little usually cause a pop back through intake. Too much causes the engine to bog. TPS AE is a short burst as throttle blade opens. MAP AE follows though when the throttle is held open during acceleration. If adding AE makes it worse, you may try to remove 10 % of the TPS AE from your original value at 20C then try 25%. View your log and watch for a TPS increase. If the O2 voltage goes lean, It usually needs more AE. If it goes rich, you need less AE.