BIGRED Z

New here. Actually I'm on several F-body forums as my fiancee and I met through a local car club. I drive a '99 Saab 95 as a daily driver though. Right now between the 2 of us we have 5 vehicles! It's getting to be an expensive collection. 2 of them are for sale, 3 will be more manageable. I joined because the Saab is a recent purchase and I'm having a few problems with it. It surges at idle most notable in hotter weather with the AC on. Some times it will stall. If I shift into neutral, it stops. You can hear the engine and see the tach surge. Ron (fiancee) and joke about it sounding like a cam loping, albeit a quiet one...well it was funny at the time. Any suggestions? Was thinking along the lines of an MAF or Throttle body positioning sensor. Thanks!

Lori