Lately my car has been wanting to idle around 2-300 after braking for a stop sign, red light, etc... and the car actually died today. I went all winter with no problems whatsoever. It's not throwing a code, and I cannot feel any misfire at all. There's absolutely no engine hesitation while I'm moving, except for my transmission. I unhooked the battery while cleaning and oiling the K&N drop in filter (a week ago), just because that's what I usually do, then the ecu will remap the tranny shifts and such. Now after these drops in RPM, the tranny will hunt a LOT to find the correct gear at almost any speed and it will take a few seconds to stabilize and after that, it's fine and dandy, until I have to stop again.
I had the timing belt serviced a few months ago
I had a new flex pipe installed because i tore the last one up with the crappy winter
I just had my oil changed and air filter cleaned
But without a CEL I have little to go on...