My stock 93 will stutter when I turn on my a/c. The idle goes up and down when i sit at a stop light and car is in gear. Idles just fine in nuetral.When first starting up the idle jumps a little bit up an down then settle in at 1000 rpm. Any ideas what i should look for. Any help greatly appreciated. Thanks

 

Could be several issues from idle air to ignition. Might just need to +/- some idle air at the air bleed, hopefully your ISC is ok.