ibayter

Hello Guys, I have this iddle problem on my 88 auto. when is hot start going up & down, I replaced the spark plugs, the Iddle control Valve, new Battery, new wires, some vacuum hoses I put new. I chech the voltage on the alternator with a voltimeter and it is charging between 12 and 14, I do not remember the reading right now.
Anybody could tell me if there is any map sensor or any other sensor I should be looking for ?
Please let me know,

Thanks

IBM