So yesterday I picked up a 95 cobra and during idle it will intermittently sound like it has a massive cam in it, having the idle surge up and down rapidly, but the motor never dies. Sometimes it will do it right on cold start for about 30 seconds and then go away and sometimes it will start fine and then randomly start doing it. I cleaned the maf which seemed to be relatively new anyways, does anyone have any ideas? I’m new to mustangs so I’m not really sure where to start