1998 Chevy Lumina stumbling at stop lites

Hi Ron, sorry about the no response, and thank you for the donation, the stumbling can be caused by a couple of things, first in mind would be the idle air control valve, then a possible mapp sensor fault, I would also do a thorough cleaning of the throttle body and throttle plate and I will show you how to do that in the next post. Another possibility could be a fuel pressure regulator problem, but not likely in this case. If there is a check engine light on, bring it to autozone and have it scanned(free). And bring the codes back to me, if there arent anycodes, then we should be ok with those things I told you to check.

https://www.2carpros.com/how_to/how_to_tune_up.htm