I have had an 02 Buick Lesabre for a few years now. It started having issues a few months back where it wants to stall when I'm coming to a stop. I go to get breakfast in the morning sometimes and it does fine starting up and getting there but wants to die at stops on my way back home. So it seems to get worse as it warms up. But I will go days where it'll be fine and not die at all. I've taken it to 2 different mechanics and one replaced the MAF sensor and now I had another mechanic try to fix it 2 days ago and he said he was getting weird readings from the MAP sensor, so he replaced it. They said the check engine light went off but it came back on shortly after getting it back. So it seems to only stay running when I am giving it lots of gas but when it dies, I have to hit the gas too fast and it jumps when putting it back into gear (trying to get out of people'* way in the road and keep it running long enough to get going). So altogether Ive had the MAF and map sensors replaced and put a new battery in it because the old one was bad. It starts up every time without a hitch. But the problem lies after it'* warmed up and I'm coming to a stop. Has anyone else had or seen similar issues?? I've bought a new fuel filter and IAC valve and plan to put them on to see if that helps. Just waiting for a warm enough day to get out and tinker with those parts and see if that helps. Any info would be appreciated 👍

Clean the throttle body and IAC valve.

Yeah, sounds like the IAC is plugged up or bad. I agree about checking the throttle body as well.