Have a strange problem, dunno if a common issue or not.

Net is that I can be cruising at 3000 rpm or whatever, take the foot off the gas and if out of gear, the rpm drops really fast all the way to 300rpm or so, then it either dies or gets a bump and goes up to 1000rpm or so briefly then back to normal idle. When its in this mode I can do it at a standstill, just revving it up to 3K or so and then taking foot off the gas. ITs the weirdest thing to pull up to a stopsign or be in a parkinglot and just have it die. All other operation is great!!

haven't tried pulling codes or checking if there are any. It used to do this maybe twice a year a single time, today it did it maybe 5 times and then stopped doing it. I recently fixed an induction boot (Usual Y boot tear) and had thought that might fix it but was obviously wrong.

thoughts??
Thanks-
Tim