I have a 90 240. KA24E motor. In the past few days, I'll start it up, and it will idle kind of rough. It has an automatic transmission, and normally it idles around 1100 when I first start it up, and it's smooth. Lately it'll hop between 700 and 900 for a bit, then smooth out. Also, yesterday morning, I started it up, and it puttered then died out.. I was able to start it afterwards, but that kind of freaked me out. And on the way home from work yesterday, I picked my car up from the carpool location and took a corner semi-sharp, where the car's idle dropped to near 300 I believe, and nearly cut out.. but then was fine.. any ideas?

 

check the lines for your intake, mine used to do something like that, and it was just cracked, loose lines, 5bucs later it ran fine

 

yeah most likely a vacuum leak