96 eclipse non-turbo idles way too high, disconnect MAP sensor it goes down but then idles rough

Yes by disconneting the map sensor will drop idle and make run rough, the problem is the idle air control valve or a vacuum leak, try to clean the throtlebody with an old tooth brush and some throtlebody spray cleaner if that doesnt help then try having the iac valve checked the iac valve (Idle air control valve ) if with the engine running listen for a hissing noise that will be a vacuum leak, these are the most common reasons for higher than normal idle. hope this is helpful.