Low idle

I have an 06 Gt Mustang and every time the air is turned on the car idles low and speeds back up. Also when coming to a stop the car almost stalls out but then picks back up. Of course ford says thats normal, but I know better any suggestions or tips?

Well, that's not normal because mine doesn't do anything at all when i turn the air on or come to a stop. sounds like the TPS throttle position sensor might be slow reacting and may need to be changed out. should be under warranty. if one dealership is un-willing to fix it. go to another dealership.

This guide can help fix it

https://www.2carpros.com/articles/stall-at-idle

Please run down this guide and report back.

Recently had it worked on and after he put it back together the idle is low and seems to bounce and pulse. It now has a flutter sound. It did not do this before he took it apart.

I did, he said it was the mass airflow system and I should get rid of it. Thank you. I will just take it to the dealership.

The car is a 2005 Mustang GT, 4.6L 3V automatic. The car is factory stock no mods.
I had to change the battery, The old battery was developing a shorted cell. After changing the battery over 3 weeks ago, I now have a problem with surging idle. It hunts up and down between 400 and 750 RPMS. It is amplified with the AC on. It sets a DTC p0506 "Idle RPM lower than expected" I can't find any vacuum leaks or air leaks. I followed a learn procedure, but mine must be really dumb. It hasn't learned anything yet. The air filter is stock and new. I replaced the TPS. No difference. There is no idle air control valve.

I had the same problem I also have auto. FIRST remove the positive red battery terminal to start work. I removed entire CAI also TB, cleaned everything with carb/tb cleaner that you can get at ford also known as tune up cleaner. 2 sensors replaced throttle position sensor on the left of TB and the MAF. If you can't afford use electronic cleaner or non residue cleaner or MAF sensor cleaner and clean all sensors. Also spray the connectors with electronic cleaner. The TB had black gunk behind the butterflies. Also if the air cleaner is old replace or clean. I had the steeda cone filter. I cleaned it with k&n filter cleaner. I let it sit overnight everything to dry. The next day I did not over spray the filter with the special oil provide by k&n. I but the whole system back making sure all bolts tight and no air leaks out. FINALLY, return battery terminal back. With my diablosport tuner returned the original tune back to car waited a few minutes then returned the steeda/performane tune back to my mustang. Cycled the key then started. WOW
the car runs like brand new no idle surges no low idle p0506 no intermitant mass air volume blah blah
p0104. No check engine light the car is faster. Do this if you don't have any other problems with your car and the only codes are the above mentioned. After a few years the system gets dirty needs cleaning don't let dealer tell you that you need custom tune don't trust them to clean the system do it yourself, you only know how good is.

Been meaning to get back to you guys with a responce. At first, I didn't think the information would be useful. After cleaning the MAF and replacing the the TPS I still had idle problems. I also had a throttle lag. Push the pedal gently. Nothing. Then all of a sudden the RPMS would jump up. It was also nearly impossible to hold a set RPM in neutral.
After reading the mechanics reponse, I bit the bullet and purchased a replacement throttle body which comes complete with the TPS and Throttle motor from Ford Discount Parts. It is now running as good as new. I think the throttle motor may have been bad. Thank you all! It is once again a pleasure to drive it.

Don

I have a problem with my Mustang, it will not idle without me pumping the gas?

I have a 2000 ford mustang. When I push the clutch in to shift the RMPs don't drop to an idle impeding me of shifting without a grinding noise. I have to wait til my car's RMPs drop below 2000 to shift the the next gear. I don't know what is doing this, I just started when I turned off my car and turned it back on after 5 minutes. The car idles and revs just fine with the clutch in and in neutral.

Does that mean the clutch is going out?